US Patent Classes - Engineering Group

US Patent Classes - Engineering Group

This is the index page for those US patent classes dealing with civil, textile, transportation and HVAC engineering. There are six sub-groups, as follows.
MATERIAL OR ARTICLE HANDLING

EARTHWORKING AND CIVIL ENGINEERING

HEATING, COOLING, BUILDINGS, FLUID HANDLING, GAS HANDLING

VEHICLES AND TRANSPORTATION

OFFICE DEVICES, PAPER HANDLING, COATINGS

TEXTILES AND APPAREL