What follows is part of the Index to the US Manual of Classifications for patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retreive patent titles by entering the class/subclass in the box below.
Enter a class/subclass code here to get a list of patent titles. Use
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363-131 121-55A 14-.5
that is, no embedded spaces, class and subclass seperated by a dash, and any
subclass letters capitalized. Currently Design Patent titles (those in the
classes of the form Dxx.yy) are not retreivable.
ALARM (SEE MONITOR; SIGNAL)
BOILER ............................122/504.2
BURGLAR
ELECTRIC, APPROACH OPERATED ....340/541+
FOR VEHICLE ....................340/426+
MECHANICAL .....................116/75+
CLOCK .............................368/244
ELECTRICALLY DRIVEN ............968/580+
MECHANICALLY DRIVEN ............968/229+
CLOSURE POSITION ..................49/13+
COFFIN ............................340/573
DESIGN ............................D10/106
GAS
ELECTRICAL .....................340/632+
MECHANICAL .....................116/67.R
HEAT EXCHANGER COMBINED ...........165/11.1
LIGHT RESPONSIVE ..................340/600+
PHOTOELECTRIC SYSTEM ...........250/200+
LOCK COMBINED .....................116/8+
DESIGN .........................D08/332
NOISE EXPOSURE ....................340/540
OVER TELEPHONE CIRCUIT ............379/37+
PIPE JOINT COMBINED ...............285/93
REGISTER MECHANISM ................235/128
SYSTEM ELECTRICAL .................340/500+
VALVE COMBINED ....................137/558
WATCHES ...........................368/244
ALATHON T M (POLYETHYLENE) .......... 526/352
ALBUM ............................... 281
BOOK BINDER SHEET .................402/79
DESIGN ............................D19/26+
DISPLAY ...........................40/152+
FASTENERS .........................24/2
LEAVES DISPLAY ...................40/152+
PHONOGRAPH RECORD
CABINET TYPE ...................312/9.1+
FOLDER CARRIER INDICIA .........40/359
PACKAGE TYPE ...................206/311
ALBUMIN ............................. 530/362+
COATING OR PLASTIC COMPOSITIONS
CONTAINING .....................106/124+
FOODS CONTAINING ..................426/656
TESTS FOR .........................436/88
ALCOHOL ............................. 568/700+
ALDEHYDE ..........................568/496+
AMINES ............................564/503+
BEVERAGES .........................426/592
APPARATUS ......................99/275+
BREATH ALCOHOL ....................436/900*
DISTILLATION
PROCESSES ......................203
STILLS .........................202/232+
SYSTEMS ........................202/152+
ELECTROLYTIC PRODUCTION ...........204/77
ETHER .............................568/672+
FERMENTATION ......................435/161+
FROM OLEFINES .....................568/895+
FUEL CONTAINING ...................44/436+
HYDROGEN PURIFICATION USING .......585/864
HYDROMETERS .......................73/32.R+
STOVE .............................126/43
TREATMENT - AGING FOR BEVERAGES ...426
ALDEHYDE ............................ 568/420+
ACYCLIC ...........................568/448+
AMINE .............................564/502
AMINE OR AMMONIA REACTION PRODUCT .564/248
AROMATIC ..........................568/425+
CELLULOSE ETHER OR ESTER
COMPOSITION CONTAINING .........106/187
FATTY ACID OR ESTER CONTAINING .106/184
FUEL CONTAINING ...................44/437+
HYDROGEN PURIFICATION USING .......585/864
POLYMER (SEE SYNTHETIC RESIN OR NATURAL RUBBER)
SULFONIC ACID AROMATIC ............562/46
WITH CARBOXYLIC ACID ESTERS
ACYCLIC ........................560/174+
ALICYCLIC ......................560/126
AROMATIC .......................560/51+
ALDOLS .............................. 568/496+
ALDOSTERONE ......................... 552/588
ALDOXIMES ........................... 564/253+
ALE SEE BEER
ALFALFA ............................. 426/636
ALFIN CATALYSTS ..................... 526/175
ALGAE
COMPOSITIONS
EDIBLE PRODUCTS FROM ...........426
SINGLE CELL PROTEIN ..........435/804*
PROTEIN EXTRACTS FROM ..........530/370
MULTICELLULAR ALGAE, CULTURING
APPARATUS AND METHODS ..........47/1.4
ALGAE, PER SE, CULTURE METHODS ....435/257.1+
SPECIES CROSS-REFERENCE ........435/946*
TRANSFORMENTS ..................435/257.2
ALGICIDE ............................ 504/150+
ALGIN ............................... 536/3
ALGOECIDE ALGICIDE ................. 504/150+
ALICYCLIC CARBOXYLIC ACID ESTERS .... 560/1+
ALICYCLIC HYDROCARBON ............... 585/22+
PURIFICATION OF ...................585/800+
SYNTHESIS OF ......................585/350+
ALIGNMENT
SCREW DRIVERS .....................81/451+
TOOLS FOR RADIO ...................81
ALIZARIN ............................ 552/261
ALKADIENE (SEE DIOLEFIN)
ALKALI
ALUMINATES ........................423/593+
AMIDS .............................423/351
CARBONATES ........................423/421+
CARBONATES ........................423/419.1+
PREPARATION BY ELECTROLYSIS ....204/87
CHEMICAL AGENTS FOR ABSORBING .....252/193
EARTH METAL SEE ALKALINE EARTH
ALLOYS .........................420/415
LEAD .........................420/564
CARBONATES .....................423/430+
CRYSTALLIZATION OF COMPOUNDS ...23/304
ELECTROLYTIC SYNTHESIS .........204/69+
HALIDES ........................423
HYDROXIDES AND OXIDES ..........423/635
ELECTROLIC SYNTHESIS OF ......204/100
ELECTROLIC TREATMENT OF ......204/153
MERCURY ALLOYS BY ELECTROLYSIS .204/125
NITRATES .......................149
CONTAINING ...................149/61+
EXPLOSIVE ....................149
ORGANIC COMPOUNDS ..............260
OXIDES .........................423/635
PEROXIDES ......................423/583
PHOSPHATES .....................423/305+
PIGMENTS FILLERS OR AGGREGATES .106/461+
PYROMETALLURGY .................75/605+
REFRACTORY COMPOSITIONS CTG ....501/123+
SULPHATES ......................423/554+
HYDROXIDE PREPARATION .............423/641
BY ELECTROLYSIS ................204/98+
METAL
ALLOYS .........................420/400
LEAD .........................420/564
CARBONATES .....................423/419.1
CHEMICAL AGENTS CONTAINING .....252/192
CHEMICAL AGENTS FOR ABSORBING ..252/193
CRYSTALLIZATION OF COMPOUNDS ...23/302.R+
ELECTROLYTIC SYNTHESIS .........204/68
ELECTROLYTIC SYNTHESIS OF ......204/98
ELECTROLYTIC SYNTHESIS OF
HYDROXIDES AND OXIDES ........204/98+
ELECTROLYTIC TREATMENT OF
HYDROXIDES AND OXIDES ........204/153
HALIDES ........................423/462+
HYDROXIDES AND OXIDES ..........423/592
INORGANIC COMPOUND RECOVERY ....423/179
MERCURY ALLOYS BY ELECTROLYSIS .204/125
MISC CHEMICAL MANUFACTURE .....156/DIG.71
NITRATES .......................149
EXPLOSIVE CONTAINING .........401/118+
ORGANIC COMPOUNDS ..............260
OXY-HALOGEN SALT ...............423/472
EXPLOSIVE ....................149/77
PHOSPHATES .....................423/304+
PREPARATION ....................75/745
PYROMETALLURGY .................75/589
SOLVENTS, SODIUM CHLORIDE &
POTASSIUM CHLORIDE ...........422/902*
SULPHATES ......................423/551
NITRATES ..........................423
ORGANIC ........................260
OXIDS
PACKING ........................206/524.1+
SECONDARY BATTERY
CHROMIUM COBALT OR CADMIUM .....429
IRON ...........................429
NICKEL .........................429
ALKALINE EARTH
CARBONATES ........................423/430+
METALS & CDS ......................156/DIG.78
OXIDES AND HYCLROXIDES ............423/635
PYROMETALLURGY ....................75/605+
SILICATES .........................423/326
SULFATES ..........................423/554+
SULFIDES ..........................423/554
ALKALOIDS
BIOCIDES CONTAINING ...............424
CINCHONA ..........................546/134+
ERGOT .............................546/67+
MEDICINES CONTAINING ..............424
OPIUM .............................546/44+
SOLANUM ...........................546/124
TOBACCO ...........................546/282
UNDETERMINED CONSTITUTION .........424/195.1
ALKAMINE
ACYCLIC ...........................564/503
ALKANOIC ESTERS ................560/253
MONOCYCLIC CARBOXYLIC ACID
ESTERS .......................560/110
MONOCYCLIC CARBOXYLIC ACID
ESTERS .......................560/106+
NITRO CARBOXYLIC ACID ESTERS ...560/20+
NITRO CARBOXYLIC ACID ESTERS ...560/156
ALKANE (SEE HYDROCARBON; PARAFIN) ... 585/700+
ALKENES (SEE OLEFINES)
ALKINES (SEE ACETYLENE; TRIPLE BOND HYDROCARBON)
ALKYD RESINS (SEE SYNTHETIC RESIN OR NATURAL RUBBER)
ALKYLATE DETERGENT SYNTHESIS ........ 585/455+
ALKYLATION
ACYCLIC HYDROCARBONS ..............585/709+
ALICYCLIC HYDROCARBONS ............585/375
AROMATIC HYDROCARBONS .............585/446+
MINERAL OIL .......................208/46+
PHENOLS ...........................568/780+
ALLANTOIN ........................... 548/318.1
IN DRUG ...........................514/390
ALLOCHIRAL ARRANGEMENTS
BULB OR TUBE SPECIAL PACKAGE ......206/422
CLOSURE ACTUATORS .................49/299
CLOSURE LINK SYSTEM ...............49/111+
TOOL WITH SERIES OF TEETH .........83/852
TOOL-FACE, METAL DEFORMING ........72/198
ALLOY
AGE OR PRECIPITATION HARDENED .....148/405
AMORPHOUS .........................148/403
BEARING COMPOSITIONS ..............252/12+
COMPOSITIONS ......................420
MAKING WHEN CASTING ............164/55.1+
CONTINUOUSLY CASTING .........164/473
DEFORMATION OF ....................72/700*
DISPERSION STRENGTHENED ...........75/951*
ELECTRODES FOR ELECTROLYTIC
APPARATUS ......................204/293
ELECTROLYTIC
COATING FROM AQUEOUS BATH ......205/234+
SYNTHESIS FROM AQUEOUS BATH ....204/123+
SYNTHESIS FROM FUSED BATH ......204/71
TREATMENT ......................204/140+
ELECTRON EMISSIVE CATHODE OF ......420
FERROUS SEE FERROUS ALLOYS ........420/8+
IRON ..............................420/8+
LOOSE METAL PARTICLES .............75/255+
MECHANICAL MEMORY .................148/402
METAL TREATMENT ...................148
METALLURGY ........................420
POWDER METALLURGY
PROCESSES ......................419
PRODUCTS .......................75/228+
PYROPHOROUS .......................420/416
RAILWAY SURFACE TRACK .............238/150
SHAPE MEMORY ......................148/402
ALLOYING
FUSING DOPANT WITH SUBSTRATE ......437/134+
ALPHA
BETA GAMMA SURVEY METER ...........250/336.1
SCINTILLATION TYPE .............250/361.R+
HAND COUNTER ......................250/374
PROPORTIONAL COUNTER ..............376/153+
SIMILAR COUNTER TUBES ..........313/93
SYSTEM .........................250/374
SCINTILLATION DETECTOR
CRYSTAL MOUNTING ...............250/361.R
ELECTRIC .......................250/361.R
NON-ELECTRIC ...................250/483.1
WITH SAMPLE HOLDER .............250/361.R+
SURVEY METERS .....................250/374
ELECTRIC .......................250/361.R
NONELECTRIC ....................250/483.1
SCINTILLATION TYPE .............250/361.R+
ALPHA GLOBULINS ..................... 530/392
ALPHABET
BLOCK .............................434/172
DESIGN, TYPE ......................D18/24+
LETTER TRAINING ...................434/159+
PLAYING CARDS .....................273/299
SPECIALIZED FONT ..................382
STENCIL ...........................101/127+
ALPHANUMERIC DISPLAY
BY MATRIX .........................345/59+
CATHODE RAY TUBE ..................345/25+
ALTARS .............................. 81
DESIGN ............................D06/329+
ALTERNATING CURRENT (SEE TYPE OF EQUIPMENT USING)
CONVERTERS TO DIRECT CURRENT ......363
ELECTROMAGNET WITH ARMATURE .......335/243+
ELECTROMAGNETIC SWITCHES ..........335/99+
GENERATOR .........................310/159+
PRIME MOVER DRIVEN .............290/5
LAMP OR ELECTRONIC TUBE ...........315/246+
METER .............................324/137+
MOTOR .............................310/159+
POLYPHASE TO ARC LAMP .............314/31
POLYPHASE TO LAMP OR ELECTRONIC 315/137
TUBE ...........................315/137+
SYSTEM
TELAUTOGRAPH ...................178/19
TELEGRAPH ......................178/66.1+
TRANSMISSION ......................307
ALTERNATING MECHANICAL MOTIONS
(SEE GEARING)) .....................74
ALTERNATOR STRUCTURE ................ 310
ALTIMETER SEE ALTITUDE INSTRUMENT ... D10/70
ELECTRICAL ECHO SYSTEMS ...........367/87+
RADIO WAVE SYSTEMS ................342/120
ALTITUDE INSTRUMENT
BAROMETRIC ........................73/384+
DESIGN ............................D10/70+
DIRECTIONAL RADIO .................342/462
LIGHT RAY TYPE ....................33/282
AERIAL BOMB SIGHT ..............33/229
OPTICAL ........................356/3+
SOLAR POSITION LOCATOR .........33/268+
TELESCOPES .....................359/399+
VERTICAL AND HORIZONTAL ANGLE ..33/281
VERTICAL ANGLE .................33/282+
PASSIVE SONIC OR SUPERSONIC OBJECT 367/118+
DETECTION TYPE .................367/118+
RADAR TYPE ........................51/229+
RADIANT ENERGY ....................342/120+
RADIOSONDE ........................340/870.1+
SYSTEM .........................340/870.1
SONIC OR SUPERSONIC ECHO SYSTEM, IE367/87+
ACTIVE SONAR ...................367/87
WITH POSITION INDICATING ..........342/462
ALTO
WIND INSTRUMENT SEE INSTRUMENT
ALUM ................................ 423/544+
ALUMINA ............................. 423/625
REFRACTORY CONTAINING .............501/127+
MAGNESIUM COMPOUND COMBINED ....501/118+
ALUMINATES .......................... 423/592+
ALUMINOSILICATE
ALICYCLIC COMPOUND SYNTHESIS ......585/475
BY ISOMERIZATION ...............585/481+
COMPOUNDS WITH PLURAL METALS ......423/118.1
SATURATED COMPOUND SYNTHESIS ......585/722
SATURATED COMPOUND SYNTHESIS ......585/739
SILICON AND SILICON COMPOUNDS .....423+
UNSATURATED COMPOUND SYNTHESIS ....585/533
UNSATURATED COMPOUND SYNTHESIS ....585/666
ALUMINUM
AGE HARDENING .....................148/694+
ALLOYS ............................420/528
COPPER .........................420/529
COMPOUNDS .........................554/38
ALUMINATES .....................423/592
AZO COMPOUNDS CONTAINING .......534/692+
AZOLES CONTAINING ..............548/101+
CARBOCYCLIC OR ACYCLIC
COMPOUNDS CONTAINING .........556/170+
DIARYLENE ORTHO DIKETONES
CONTAINING ...................552/209
DIAZINE CONTAINING .............544/225
DIAZO COMPOUNDS CONTAINING .....534/562+
HALIDES ........................423/462
HIGHER FATTY ACIDS CONTAINING ..554/76
INORGANIC ......................423
MISC CHEMICAL MANUFACTURE .....156/DIG.61
WITH 3 &/OR 4 COMPOUNDS ......156/DIG.104
NITRIDES .......................423/409
ORGANIC ........................556/170+
CHELATES .....................556/175
CLAY OR ZEOLITE CONTAINING ...556/173
SALICYLATES ..................556/175
SESQUIHALIDES ................556/180
OXAZINE CONTAINING .............544/64
OXIDES .........................423/625
PROTEINS CONTAINING ............530/400+
PYRIDINE NUCLEUS COMPOUNDS 546/2+
CONTAINING ...................546/2
SULPHATES ......................423/544+
THIAZINE CONTAINING ............544/4
TRIARYLMETHANES CONTAINING .....552/103
ELECTROLYTIC COATING OF ...........205/323+
CLEANING OR ETCHING COMBINED ...205/213+
ELECTROLYTIC SYNTHESIS ............204/67
ELECTROTHERMIC PROCESSES ..........75/10.1+
HEAT TREATMENT ....................148/688+
METAL WORKING USING ...............29/DIG.2
PIGMENTS ..........................106/404
PLATE .............................428/650+
PYROMETALLURGY ....................75/671+
AMALGAM MIXER, EG DENTAL FILLING .... 366/602*
AMALGAMATOR (SEE MERCURY)
COATED SURFACE ADHESION ...........209/50+
MERCURY SUSPENSION ................209/174+
OTHER SEPARATORS COMBINED .........209/12+
SELECTIVE DIFFERENTIATION .........209/48
AMANTADINE, IN DRUG ................. 514/656
AMBERLITE T M (ION EXCHANGE RESINS) . 521/25+
AMBULANCE ........................... 296/19+
AMBULATORY PNEUMATIC SPLINTS ........ 602/10
AMIDES .............................. 564
HIGHER FATTY ACID .................554/35+
SULPHONATED ....................554/42+
AMIDINES ............................ 564/225+
AROMATIC ..........................564/244+
N PRIME-ARYL FORMAMIDINES .........564/245
POLYAMIDINES ......................564/243
AMIDINO HYDRAZINES OR HYDRAZONES .... 564/226+
AMIDOXIMES .......................... 564/229
AMINE ............................... 564
ACYCLIC ...........................564/463+
ALDEHYDE OR KETONE CTG .........564/502
HYDROXY OR ETHER CTG ...........564/503+
PLURAL AMINE CTG ...............564/511+
SULFUR .........................564/500+
UNSATURATED ....................564/509
ALDEHYDE (SEE AZOMETHINE)
AROMATIC ..........................564/305+
ARALKYL ........................564/374+
ARYLOXY ALKANOL ................564/349+
ARYLOXY ALKYL ..................564/347+
BENZYL .........................564/384+
DIARYL AMINES ..................564/433+
DIPHENYL ETHER OR SULFIDES .....564/430
MONOCYCLIC .....................564/305
PHENETHYL ......................564/376+
POLYCYLO RING SYSTEM ..........564/426+
BORON CTG .........................564/8+
BONDED DIRECTLY TO NITROGEN ....564/9+
BORON-NITROGEN RINGS ...........564/10+
CARBOCYCLIC .......................564/305+
OXIDES ............................564/297+
PHENOL ADDITION SALTS .............564/280+
PHOSPHORUS BONDED
DIRECTLY TO NITROGEN ...........564/12+
IN SAME RING .................564/13
INDIRECTLY TO AMINO NITROGEN ...564/15+
PHOSPHOROUS IN A RING ........564/106
PREPARATION
AMINATION ......................564/395+
DEALKYLATION OF SECONDARY OR
TERTIARY AMINE ...............564/486
FROM AMIDES ....................564/414
FROM AMIDES ....................564/488
FROM ESTERS ....................564/393
FROM ESTERS ....................564/468
FROM HETEROCYCLIC COMPOUND .....564/413
FROM ORGANIC ACID ACID HALIDE
OR SALT ......................564/394
HALOGENATION OR DEHALOGENATION .564/412
NITRATION ......................564/411
NITROSATION ....................564/410
PURIFICATION OR RECOVERY .......564/497+
REDUCTION ......................564/448+
RING ALKYLATION OR DEAKYLATION .564/409
SEPARATION OF AROMATIC ISOMERE .564/424+
STABILIZED OR PRESERVED ...........564/5+
AMINIMINES .......................... 564/464+
AMINO ACIDS ......................... 260
ACYCLIC ...........................562/553+
AROMATIC ..........................562/433+
PROTEIN DERIVED ...................562/516
TESTS FOR .........................436/89
AMINO CARBOXYLIC ACID ESTERS
ACYCLIC ...........................560/155+
ALICYCLIC .........................560/125
AROMATIC ..........................560/19+
AMINO OPTICAL ISOMERS
RACEMIZATION ......................564/302
RESOLUTION ........................564/303
AMINOPHENOLS ........................ 564/305+
AMINOPLAST (SEE SYNTHETIC RESIN OR NATURAL RUBBER)
AMINOPYRINE ......................... 548/367.4
AMMETER ............................. 324/76.11+
AMMONIA
CHEMICAL AGENTS FOR BINDING .......252/193
DERIVATIVES INORGANIC .............423
DEVELOPING ........................430/150
MACHINES .......................354/300
DISTILLATION PROCESSES ............203
ELECTROLYTIC SYNTHESIS ............204/102
GAS GENERATORS ....................422/148
MEDICATOR .........................128/203.12
PRODUCTION ........................423/352+
SODA APPARATUS ....................422/148
STILLS ............................202/232+
SYSTEMS FOR DISTILLING ............202/152+
AMMONIUM
CRYSTALLIZATION OF COMPOUNDS ......23/302.A
ELECTROLYTIC SYNTHESIS OF
COMPOUNDS ......................204/102
FERTILIZER CONTAINING COMPOUNDS ...71
HALIDES ...........................423/470
NITRATES ..........................423/396
EXPLOSIVE OR THERMIC
COMPOSITION CONTAINING .......149/46+
PERCHLORATES ......................423/476
EXPLOSIVE OR THERMIC
COMPOSITION CONTAINING .......149/76
PHOSPHATES ........................423/305+
QUATERNARY ........................564/281+
SULPHATES .........................423/545+
AMMONOLYSIS ......................... 564
ACYCLIC AMINE PRODUCTION ..........564/469+
ANTHRAQUINONE ALPHA AMINE
PRODUCTION .....................552/238+
ANTHRAQUINONE BETA AMINE PRODUCTION552/236+
AROMATIC AMINE PRODUCTION .........564/395
AMMUNITION (SEE CAP; MAGAZINE; SHELL;
ORDNANCE ...........................102
ARMOR PIERCING ....................102/517+
BELTS .............................89/35.1+
BLASTING ..........................102/301+
CARTRIDGES ........................102/430+
COMBUSTIBLE ....................102/431+
X-ART COLLECTION .............102/700*
HOLDER .........................224/223
BANDOLEER ....................224/203
COVERED ......................224/239
PACKING ........................86/47+
CHARGE WAVE FORMING ...............102/305+
X-ART COLLECTION ...............102/701*
COMPRESSION IGNITION ..............102/702*
COOLANTS ..........................102/704*
DESIGN ............................D22/112+
BELT OR BELT
ATTACHABLE HOLDERS ...........D03/100
DROP BOMBS ........................102/382+
EXPLOSIVE & THERMIC COMPOSITIONS
OR CHARGES .....................149
EXPLOSIVE CHARGE MAKING ...........86
EXPLOSIVE DEVICES & AMMUNITION ....102
FEEDING DEVICES ...................86/45+
FIREARMS ..........................42
FLECHETTE .........................102/703*
FUSES, PRIMERS & IGNITING DEVICES .102/200+
HEAT SHIELD .......................244/158.R
LOADING ...........................86/23+
MAKING ............................86/10+
MINES .............................102/401+
NARCOTIC CONTAINING ...............102/512
NON-RICOCHETING ...................102/398
ORDNANCE ..........................89
MECHANICAL GUNS & PROJECTORS ...124
POWDER BAGS .......................102
POWDER FORM .......................102/282
PROJECTILE ........................102/501+
PYROTECHNICS ......................102/335+
RECEPTACLE ........................206/3
BODY OR BELT ATTACHED ..........224/223
SABOTS & RIFLING BANDS ............102/520+
SEPARATED EXPLOSIVE CONSTITUENTS ..102/705*
SHELLS ............................102/473+
TESTING ...........................73/167
TORPEDOES, AIRCRAFT ...............244/14
TORPEDOES, SHIPS ..................114/20.1+
WADS ..............................102/448+
WELL TORPEDOES ....................102/301+
AMORPHOUS ALLOY OR METAL STOCK ...... 148/403
AMOXICILLIN ......................... 540/331
AMPERE METER ........................ 324/76.11+
AMPHETAMINE ......................... 564/381
IN DRUG ...........................514/654
AMPHIBIAN VEHICLES
AIRBORNE ..........................244/50
FLUID CUSHION ..................180/116+
DESIGN ............................D12/324
LANDING GEAR ......................244/101
AMPICILLIN .......................... 540/336
AMPICILLIN, IN DRUG ................. 514/198
AMPLIDYNE ........................... 322/92
AMPLIFIER ........................... 330
A C RAW POWER OR BIAS SUPPLY ...330/114+
ADJUSTABLE COUPLING IMPEDANCE
AUTOMATIC ......................330/144+
AUTOMATIC THERMAL ..............330/143
ANODE VOLTAGE CONTROL .............330/128
ANODE VOLTAGE SUPPLY ..............330/202
WITH INPUT ELECTRODE BIAS ......330/203
ARTIFICIAL LINE COUPLING ..........330/57
BEAM POWER ........................313/299
DIODE ..........................313/298
WITH BEAM FORMING ELECTRODES ...313/299+
BIAS VOLTAGE CONTROL ..............330/129+
IN FEEDBACK AMPLIFIER ..........330/96
IN PUSH PULL AMPLIFIER .........330/182
BOOTSTRAP .........................330/156
BRIDGE, WHEATSTONE ................330/146
CASCODE TYPE ...................330/72
IMPEDANCE NETWORK IN COUPLING 330/175
CIRCUIT ......................330/175
BUFFER ............................330
RADIO TRANSMITTER WITH .........455/91+
BYPASS OF AN AMPLIFIER STAGE ......330/151
CAPACITIVE AMPLIFIER DEVICE SYSTEM 330/7
INPUT ..........................330/185
INTERSTAGE .....................330/177+
L IN ANODE OR GRID CIRCUIT .....330/179
L IN SERIES BETWEEN STAGES .....330/178
OUTPUT .........................330/192
R IN ANODE AND GRID CIRCUIT
BETWEEN STAGES ...............330/180
R IN SERIES BETWEEN STAGES .....330/178
CASCADED DIFFERENTLY COUPLED STAGE 330/152+
INCLUDING A CATHODE FOLLOWER ...330/153
INCLUDING AN INTERSTAGE
RESONANT NETWORK .............330/154
INCLUDING INTERSTAGE
TRANSFORMER COUPLING .........330/154
CASCODE ...........................330/70+
CATHODE SELF BIASING CIRCUIT ......330/142
CATHODE TO CATHODE COUPLING OF
ADJACENT STAGES ................330/89
CATHODE TO CATHODE FEEDBACK .......330/88+
CLASS D TYPE ......................330/251
COMBINED WITH DIVERSE TYPE ART
DEVICE .........................330/1.R
COMPRESSOR THRU BIAS CONTROL ......330/129+
OUTPUT .........................330/193+
PHASE INVERTER .................330/117
PUSH PULL ......................330/119
COMPRESSOR THRU IMPEDANCE CONTROL .330/144+
INTERSTAGE .....................330/158+
PUSH PULL ......................330/119
COMPRESSOR THRU THERMAL IMPEDANCE 330/143
CONTROL ........................330/143
SCREEN GRID INPUT ..............330/161
SCREEN GRID OUTPUT .............330/163
COUPLING FROM CATHODE
INTERSTAGE .....................330/172+
INTERSTAGE TRANSFORMER .........330/168
COUPLING FROM GRID ................330/162+
COUPLING FROM SCREEN GRID .........330/162+
COUPLING IMPEDANCE AUTOMATICALLY 330/144+
VARIED .........................330/144+
DIODE ..........................330/145
ELECTRONIC TUBE ................330/145
THERMAL ........................330/143
COUPLING NETWORK
H FILTER .......................330/176
LATTICE FILTER .................330/175
P I FILTER .....................330/176
R C ............................330/180
T FILTER .......................330/176
WHEATSTONE BRIDGE ..............330/175
COUPLING TO CATHODE
BOOTSTRAP ......................330/156
INPUT ..........................330/186+
COUPLING TO PLATE OR AUXILIARY 330/160+
ELECTRODE ......................330/160+
COUPLING TO SCREEN GRID ...........330/160+
CURRENT MIRROR TYPE ...............330/257
CURRENT MIRROR TYPE ...............330/288
D C COUPLING
CATHODE INPUT ..................330/187
CATHODE INPUT INTERSTAGE .......330/159
CATHODE OUTPUT .................330/194
CATHODE OUTPUT INTERSTAGE ......330/173
GRID OUTPUT ....................330/163
INPUT ..........................330/191
INTERSTAGE .....................330/181+
OUTPUT .........................330/198
PLATE OR AUX ELECTRODE INPUT ...330/161
PUSH PULL INTERSTAGE ...........330/121
DESIGN ............................D14/188+
DETECTOR FOR AVC ..................330/140
BIASED .........................330/138
TRIODE .........................313/293+
DIFFERENTIAL ......................330/69
DIODE AS COUPLING ELEMENT .........330/164
DIODE POWER PENTODE ...............313/298
WITH TWO CATHODES ..............313/5
DIODE TYPE ........................330/287
WITH PLURAL POWER SUPPLIES .....315/166
DIRECT COUPLED POWER ..............313/3
DISTORTION BUCKING IN .............330/149
DISTRIBUTED PARAMETER COUPLING ....330/53+
DIVERSE TYPE AMPLIFYING DEVICES ...330/3
DYNAMIC COUPLED POWER .............313/3
DYNAMO- ELECTRIC ROTARY LINEAR ....330/58
ELECTRIC ..........................330
AUTOMATICALLY VARIED IMPEDANCE 330/86
IN FEEDBACK PATH .............330/86
AUXILIARY ELECTRODE ............330/111
CASCADE AMPLIFIERS .............330/98+
CATHODE ........................330/87+
CATHODE IMPEDANCE FEEDBACK .....330/87+
CATHODE-CATHODE FEEDBACK .......330/88+
COMBINED WITH BIAS VOLTAGE 330/85
CONTROL OF FL BL AMPLIFIER ...330/85
COMBINED WITH BIAS VOLTAGE 330/96
CONTROL OF SIGNAL AMPLIFIER ..330/96
CURRENT AND VOLTAGE FEEDBACK ...330/102
CURRENT FEEDBACK ...............330/105
DC SIGNAL FEEDBACK PATH ........330/97
IN PUSH PULL AMPLIFIER .......330/83
ELECTROMECHANICAL TELEPHONE ....381/161+
ELECTRONIC TUBE TYPE ...........330
FREQUENCY RESPONSIVE ...........330/109
FREQUENCY RESPONSIVE CATHODE
IMPEDANCE ....................330/94
NEGATIVE FEEDBACK ..............330/75+
NON- LINEAR CATHODE IMPEDANCE ..330/95
NON- LINEAR IMPEDANCE ..........330/110
PHASE SHIFT MEANS IN LOOP PATH .330/107
PLURAL CHANNEL AMPLIFIERS ......330/84
POSITIVE FEEDBACK ..............330/112
PULSE AMPLIFIER ELECTRONIC
TUBE TYPE ....................328/53+
TRANSFORMER ....................336
TRANSISTOR MAKING
APPARATUS ....................29/25.2
PROCESS ......................437
TRANSISTOR SYSTEM SEE
AMPLIFIER, TRANSISTOR ........330/250+
TRANSISTOR SYSTEM NON-LINEAR ...307/200.1+
TRAVELING WAVE TUBE SYSTEMS ....330/43
TRAVELING WAVE TYPE 315/3.5
TUBE STRUCTURE ...............315/3.5
TRAVELING WAVE TYPE 315/39.3
TUBE STRUCTURE ...............315/39.3
TWO WAY TELEPHONE REPEATER .....379/338+
ELECTROCARDIOGRAPH ................128/902*
ELECTROLYTIC ......................330/207.R
ELECTROMECHANICAL TRANSDUCER
COUPLING ELEMENT ...............330/174
POSITIVE AND NEGATIVE FEEDBACK
IN PUSH PULL AMPLIFIERS ......330/82
POSITIVE AND NEGATIVE FEEDBACK
IN SAME PATH .................330/101
POSITIVE FEEDBACK INCLUDED WITH
CATHODE IMPEDANCE FEEDBACK ...330/93
PUSH PULL AMPLIFIERS ...........330/81+
ELECTRON BEAM TUBE SYSTEMS ........330/44+
ELECTRONIC TUBE AS COUPLING
ELEMENT ........................330/164
FEEDBACK ..........................330/75+
AMPLIFIER IN FEEDBACK PATH .....330/85
FILAMENTARY CATHODE ...............330/206
AC SUPPLY ......................330/115
PLURAL .........................330/201
WITH INPUT ELECTRODE SUPPLY ....330/205
GAS TUBE AMPLIFYING DEVICE SYSTEM .330/41
GUITAR ............................84/723+
HUM BUCKING IN ....................330/149
INDICATING AMPLIFIER CONDITION ....330/2
INPUT .............................330/185+
INPUT COUPLING ....................330/185+
PUSH PULL ......................330/122
INTEGRATED CIRCUITS ...............330/307
INTERSTAGE COUPLING ...............330/157+
PUSH PULL ......................330/120+
LIGHT CONTROLLED OR ACTIVATED
MEANS IN AMPLIFIER SYSTEM ......330/59
MAGNETIC LINEAR ...................330/8
MAGNETIC SWITCHING ................307/415
MAGNETIC VOLTAGE MAGNITUDE CONTROL 323
EXTERNAL OR OPERATOR CONTROLLED 323/329
INPUT RESPONSIVE ...............323/302
OUTPUT RESPONSIVE ..............323/249
SELF REGULATING ................323/310
MAGNETO-RESISTIVE TYPE AMPLIFIER
DEVICE .........................330/62
MAGNETO-STRICTIVE MEANS IN
AMPLIFIER SYSTEM ...............330/60
MAGNETRON SYSTEMS .................330/47+
MASERTYPE .........................330/5
MEASURING AMPLIFIER CONDITION .....330/2
MICROPHONE ........................381/111+
MODULATOR- DEMODULATOR SYSTEMS ....330/10
NEUTRALIZATION BY FEEDBACK ........330/76+
NEUTRALIZATION BY FEEDBACK
TRANSISTOR .....................330/292
NEUTRON ...........................376/171
NOISE BUCKING IN ..................330/149
OUTPUT COUPLING ...................330/192+
PUSH PULL ......................330/122
PARAMETRIC TYPE CAPACITIVE REACTOR 330/7
PARAMETRIC TYPE DISTRIBUTED
PARAMETER SOLID ELEMENT ........330/5
PARAMETRIC TYPE SATURABLE CORE
REACTOR ........................330/8
COMBINED WITH METER ............324/118
PENTODE ...........................330
PENTODE ...........................313/300
PHASE INVERTERS ...................330/116
PHASE INVERTERS ...................330/117
PHASE INVERTERS TRANSISTORS .......330/301
PIEZOELECTRIC CRYSTAL COUPLING
ELEMENT ........................330/174
PILOT CURRENT CONTROLLED ..........330/52
PLURAL AMPLIFIER CHANNEL SYSTEMS ..330/124.R+
PLURAL INPUT SOURCES ..............330/147
PLURAL OUTPUT LOADS ...............330/148
POWER SUPPLY ......................330/199+
AC RAW ........................330/114+
CONTROL OR REGULATION ..........330/127+
POLYPHASE ......................330/113
PUSH PULL ......................330/123
PUSH PULL CONTROL OR REGULATION 330/123
PRESELECTOR .......................330
PRINTED CIRCUITS IN AMPLIFIER
SYSTEM .........................330/66
PROTECTION MEANS ..................330/298
PUSH PULL SYSTEMS .................330/118+
RADIO FREQUENCY ...................330
POWER AMPLIFIER ................330
SHIELDED .......................330/68
WITH GAIN CONTROL ..............330/129+
RESISTANCE COUPLED ................330/180
RESISTIVE TYPE AMPLIFYING DEVICE 330/61.R
SYSTEMS ........................330/61.R
SATURABLE CORE REACTOR SYSTEMS
EXTERNAL OR OPERATOR CONTROLLED 323/329
INPUT RESPONSIVE ...............323/302
LINEAR .........................330/8
NON- LINEAR ....................307/401
OUTPUT RESPONSIVE ..............323/249
SELF REGULATING ................323/310
VOLTAGE MAGNITUDE CONTROL ......323
SCREEN GRID VOLTAGE CONTROL .......330/128
SECONDARY EMITTER VACUUM TUBE
SYSTEMS ........................330/42
SEMICONDUCTOR DEVICE SEE AMPLIFIER, TRANSISTOR
SERIES ENERGIZED TUBES ............330/70+
SOUND .............................181
DIAPHRAGMS AND MOUNTINGS .......181/148+
ELECTROMECHANICAL AUDIO ........381/161+
MEGAPHONES .....................181/177+
RECEIVER TELEGRAPH .............178/100
RECORDING AND REPRODUCING ......369
SPEAKER ...........................381/111+
STAGGER TUNED .....................330/154
SUM & DIFFERENCE AMPLIFIERS .......330/69
TESTING AMPLIFIER CONDITION .......330/2
THERMAL IMPEDANCE IN AMPLIFIER
SIGNAL PATH ....................330/143
DIODE TYPE .....................330/287
ELECTROSTATIC FIELD CONTROL ....330/277
FEEDBACK .......................330/291+
FOUR ELECTRODE TYPE ............330/307
GRADED CONDUCTIVITY TYPE .......330/250+
INPUT TO COLLECTOR .............330/250+
INTRINSIC ZONE .................330/250+
LIGHT CONTROL ..................330/308
NEGATIVE FEEDBACK ..............330/293
NEUTRALIZATION BY FEEDBACK .....330/292
PLURAL CHANNEL .................330/295
PLURAL INPUT ...................330/295
PLURAL OUTPUT ..................330/295
PUSH- PULL .....................330/262+
RADIANT ENERGY BOMBARDING ......330/308
THREE ELECTRODE TYPE ...........330/309
UNBALANCED TO BALANCED .........330/301
VOLUME CONTROL .................330/278+
TIME CONSTANT CIRCUIT IN BIAS 330/141
CONTROL SYSTEM .................330/141
TONE CONTROL AUTOMATIC
DIODE AS VARIABLE COUPLING
IMPEDANCE ....................330/145
ELECTRONIC TUBE AS VARIABLE
COUPLING IMPEDANCE ...........330/145
FEEDBACK FREQUENCY SELECTIVE
NETWORK ......................330/109
FEEDBACK FREQUENCY SELECTIVE
NETWORK IN CATHODE IMPEDANCE .330/94
IMPEDANCE CONTROL IN FEEDBACK
PATH .........................330/86
PHASE SHIFT MEANS IN FEEDBACK
AMPLIFIER ....................330/107
VARIABLE COUPLING IMPEDANCE ....330/144+
VARIABLE COUPLING THERMAL
IMPEDANCE ....................330/143
TONE CONTROL MANUAL ...............330
INPUT COUPLING ADJUSTMENT ......330/185+
INTERSTAGE COUPLING ADJUSTMENT .330/157+
OUTPUT COUPLING ADJUSTMENT .....330/192+
PLURAL AMPLIFIER CHANNELS
DIFFERENT FREQUENCIES ........330/126
POTENTIOMETER COMMON TO SIGNAL 330/108
AND FEEDBACK PATH ............330/108
PUSH PULL INPUT COUPLING
ADJUSTMENT ...................330/122
PUSH PULL INTERSTAGE COUPLING 330/120+
ADJUSTMENT ...................330/120+
PUSH PULL OUTPUT COUPLING
ADJUSTMENT ...................330/122
UNICONTROL MEANS ...............330/155
TRANSDUCTOR LINEAR ................330/8
TRANSDUCTOR VOLTAGE MAGNITUDE
CONTROL GENERAL ................323
EXTERNAL OR OPERATOR CONTROLLED 323/329
INPUT RESPONSIVE ...............323/302
OUTPUT RESPONSIVE ..............323/249
SELF REGULATING ................323/310
TRANSFORMER COUPLING
ADDITIONAL IMPEDANCE INPUT .....330/189
ADDITIONAL IMPEDANCE INTERSTAGE 330/167
ADDITIONAL IMPEDANCE OUTPUT ....330/196
ADDITIONAL REACTIVE COUPLING ...330/166
ADJUSTABLE INDUCTANCE ..........330/169
CATHODE INPUT ..................330/186
CATHODE INPUT INTERSTAGE .......330/158
CATHODE OUTPUT .................330/193
CATHODE OUTPUT INTERSTAGE ......330/168
IN CASCADE DIFFERENTLY COUPLED
STAGES .......................330/154
INPUT ..........................330/188+
INTERSTAGE .....................330/165+
OUTPUT .........................330/195+
PUSH PULL INPUT ................330/122
PUSH PULL INTERSTAGE ...........330/120
PUSH PULL OUTPUT ...............330/122
STAGGER TUNED ..................330/154
STRUCTURE INPUT ................330/190
STRUCTURE INTERSTAGE ...........330/171
STRUCTURE OUTPUT ...............330/197
TUNED INPUT ....................330/189
TUNED INTERSTAGE ...............330/167
TUNED OUTPUT ...................330/196
WITH SHIELDING .................330/170
TRANSISTOR SYSTEM, NON-LINEAR .....307/200.1+
TRANSISTOR, LINEAR ................330/250+
BALANCED TO UNBALANCED .........330/301
CASCADED .......................330/310+
COMBINED DIVERSE TYPE COMBINED .330/299+
COMBINED WITH SEMICONDUCTOR
DIODE ........................330/299+
COMMON COLLECTOR ...............330/250+
COMPLEMENTARY TYPES CASCADED ...330/310+
COMPLEMENTARY TYPES PARALLEL
INPUT ........................330/263+
DC COUPLED CASCADED ............330/310+
TRAVELLING WAVE TUBE SYSTEMS ......330/43
TWIN TRIODE POWER .................313/301
WITH TWO CATHODES ..............313/6
UNICONTROL OF COUPLING ............330/155
VAPOR TUBE AMPLIFYING DEVICE
SYSTEM .........................330/41
VOLTAGE DELAY IN BIAS CONTROL
AMPLIFIER ......................330/132
VOLUME CONTROL AUTOMATIC ..........330
AMPLIFIER IN FEEDBACK PATH .....330/85
ANODE VOLTAGE CONTROL ..........330/128
BIAS CONTROL ...................330/129+
DIODE IMPEDANCE VARIABLE .......330/145
ELECTRONIC TUBE IMPEDANCE
VARIABLE .....................330/145
FEEDBACK .......................330/75+
POWER SUPPLY REGULATION ........330/127+
PUSH PULL AMPLIFIER BIAS OR 330/123
POWER SUPPLY CONTROL .........330/123
VARIABLE COUPLING IMPEDANCE ....330/144+
VARIABLE COUPLING THERMAL 330/143
IMPEDANCE ....................330/143
VARIABLE FEEDBACK IMPEDANCE ....330/86
VOLUME CONTROL MANUAL
ANODE VOLTAGE ADJUSTMENT .......330/128
BIAS ADJUSTMENT ................330/129
CATHODE SELF BIAS ADJUSTMENT ...330/142
INPUT COUPLING ADJUSTMENT ......330/185+
INPUT COUPLING ADJUSTMENT PUSH
PULL AMPLIFIER ...............330/122
INTERSTAGE COUPLING ADJUSTMENT .330/157+
INTERSTAGE COUPLING ADJUSTMENT
PUSH PULL AMPLIFIER ..........330/120+
OUTPUT COUPLING ADJUSTMENT .....330/192+
OUTPUT COUPLING ADJUSTMENT
PUSH PULL AMPLIFIER ..........330/122
POTENTIOMETER COMMON TO SIGNAL
AND FEEDBACK PATHS ...........330/108
POWER OR BIAS SUPPLY ADJUSTMENT 330/127+
POWER OR BIAS SUPPLY ADJUSTMENT 330/123
IN PUSH PULL AMPLIFIER .......330/123
UNICONTROL MEANS ...............330/155
WITH HIGH FREQUENCY STRUCTURE .....330/53+
WITH LONG LINE ....................330/53+
WITH VOLUME COMPRESSION
THRU BIAS CONTROL ............330/129+
WITH VOLUME COMPRESSION THRU
IMPEDANCE CONTROL ..............330/144+
WITH VOLUME COMPRESSION THRU
THERMAL IMPEDANCE CONTROL ......330/143
AMPLITUDE DISTRIBUTION .............. 324/76.13
COMPARISON, COMPRESSIONAL WAVE,
GEOPHYSICAL ....................367/30
LIMITER
AMPLIFIER AVC ..................330/129+
CLIPPER
GRID CONTROL TYPE ............328/54
TELEPHONE SYSTEM ..................330