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blasting (287) 287
heating (287) 287
lighting (287) 287
mechanical engineering (287) 287
weapons (287) 287
heat exchange in general (252) 252
details of heat-exchange and heat-transfer apparatus, ofgeneral application (251) 251
heat-exchange apparatus, not provided for in another subclass,in which the heat-exchange media do not come into direct contact (172) 172
combined heating and refrigeration systems (137) 137
heat pump systems (137) 137
liquefaction solidification of gases (137) 137
manufacture or storage of ice (137) 137
refrigeration or cooling (137) 137
performing operations (105) 105
transporting (105) 105
fluid-pressure actuators (102) 102
hydraulics or pneumatics in general (102) 102
fluid dynamics, i.e. methods or means for influencing the flowof gases or liquids (101) 101
heat-pump systems (97) 97
refrigeration machines, plants or systems (97) 97
ranges (69) 69
ventilating (69) 69
human necessities (62) 62
physical or chemical processes or apparatus in general (62) 62
engineering elements and units (57) 57
general measures for producing and maintaining effectivefunctioning of machines or installations (57) 57
joints or fittings for pipes (57) 57
means for thermal insulation in general (57) 57
pipes (57) 57
supports for pipes, cables or protective tubing (57) 57
thermal insulation in general (57) 57
agriculture (54) 54
animal husbandry (54) 54
fishing (54) 54
forestry (54) 54
hunting (54) 54
parts, details, or accessories of agricultural machines orimplements, in general (54) 54
soil working in agriculture or forestry (54) 54
trapping (54) 54
physics (49) 49
separation (44) 44
air-conditioning, air-humidification, ventilation, use of aircurrents for screening (40) 40
fixed constructions (40) 40
heat-exchange apparatus, not provided for in another subclass,in which the heat-exchange media come into direct contactwithout chemical interaction (39) 39
building (38) 38
cold rooms (37) 37
cooling or freezing apparatus not covered by any othersubclass (37) 37
finishing work on buildings, e.g. stairs, floors (37) 37
ice-boxes (37) 37
non-positive displacement pumps (37) 37
positive displacement machines for liquids (37) 37
pumps for liquids or elastic fluids (37) 37
refrigerators (37) 37
general tagging of cross-sectional technologies spanning over several sections of the ipc (29) 29
general tagging of new technological developments (29) 29
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (29) 29
measuring (27) 27
measuring force, stress, torque, work, mechanical power,mechanical efficiency, or fluid pressure (27) 27
testing (27) 27
technical subjects covered by former uspc (21) 21
vehicles in general (21) 21
technical subjects covered by former us classification (20) 20
chemistry (18) 18
fertilising (18) 18
metallurgy (18) 18
planting (18) 18
sowing (18) 18
domestic hot-water supply systems (17) 17
domestic- or space-heating systems, e.g. central heatingsystems (17) 17
elements or components therefor (17) 17
functional features or details common to both smallarms andordnance, e.g. cannons (17) 17
mountings for smallarms or ordnance (17) 17
controlling (15) 15
regulating (15) 15
systems for controlling or regulating non-electric variables (15) 15
arrangements or adaptations of heating, cooling, ventilating,or other air-treating devices specially for passenger or goodsspaces of vehicles (14) 14
mixing, e.g. dissolving, emulsifying, dispersing (13) 13
technologies or applications for mitigation or adaptation againstclimate change (13) 13
details or accessories of furnaces, kilns, ovens, or retorts,in so far as they are of kinds occurring in more than one kindof furnace (10) 10
engine plants in general (10) 10
furnaces (10) 10
kilns (10) 10
machines or engines in general (10) 10
ovens (10) 10
retorts (10) 10
steam engines (10) 10
chemical or physical processes, e.g. catalysis or colloidchemistry (9) 9
details of domestic stoves or ranges, of general application (9) 9
other domestic stoves or ranges (9) 9
their relevant apparatus (9) 9
body details or kinds of railway vehicles (8) 8
electricity (8) 8
railways (8) 8
treatment of water, waste water, sewage, or sludge (8) 8
basic electric elements (7) 7
calculating (7) 7
climate change mitigation technologies related totransportation (7) 7
computing (7) 7
counting (7) 7
electric digital data processing (7) 7
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English (311) 311
Chinese (82) 82
French (53) 53
Japanese (38) 38
German (27) 27
Korean (26) 26
Spanish (8) 8
Portuguese (4) 4
Norwegian (3) 3
Czech (2) 2
Finnish (2) 2
Danish (1) 1
Dutch (1) 1
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