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
- Class: 62 Refrigeration
- Class: 237 Heating systems
- Class: 236 Automatic temperature and humidity regulation
- Class: 432 Heating
- Class: 122 Liquid heaters and vaporizers
- Class: 126 Stoves and furnaces
- Class: 431 Combustion
- Class: 110 Furnaces
- Class: 165 Heat exchange
- Class: 135 Tent, canopy, umbrella, or cane
- Class: 109 Safes, bank protection, or a related device
- Class: 52 Static structures (e.g., buildings) [53K]
- Class: 182 Fire escape, ladder, or scaffold
- Class: 194 Check-actuated control mechanisms
- Class: 137 Fluid handling
- Class: 138 Pipes and tubular conduits
- Class: 454 Ventilation
- Class: 4 Baths, closets, sinks, and spittoons
- Class: 15 Brushing, scrubbing, and general cleaning
- Class: 251 Valves and valve actuation
- Class: 169 Fire extinguishers
- Class: 494 Imperforate bowl: centrifugal separators
- Class: 239 Fluid sprinkling, spraying, and diffusing
- Class: 141 Fluent material handling, with receiver or receiver coacting means
- Class: 48 Gas: heating and illuminating
- Class: 134 Cleaning and liquid contact with solids
- Class: 34 Drying and gas or vapor contact with solids
VEHICLES AND TRANSPORTATION
OFFICE DEVICES, PAPER HANDLING, COATINGS
TEXTILES AND APPAREL