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Patent (132500) 132500
Newspaper Article (926) 926
Journal Article (305) 305
Magazine Article (47) 47
Conference Proceeding (17) 17
Book / eBook (11) 11
Book Chapter (9) 9
Trade Publication Article (7) 7
Journal / eJournal (5) 5
Dissertation (1) 1
Government Document (1) 1
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mechanical engineering (127184) 127184
heating (127171) 127171
blasting (127166) 127166
lighting (127166) 127166
weapons (127166) 127166
engine plants in general (123224) 123224
machines or engines in general (123224) 123224
steam engines (123224) 123224
crankcase ventilating (122715) 122715
lubricating internal combustion engines (122715) 122715
lubricating of machines or engines in general (122715) 122715
combustion engines (49454) 49454
hot-gas or combustion-product engine plants (49454) 49454
engineering elements and units (28073) 28073
general measures for producing and maintaining effectivefunctioning of machines or installations (28073) 28073
thermal insulation in general (28073) 28073
combustion engines in general (25121) 25121
internal-combustion piston engines (25121) 25121
performing operations (24428) 24428
transporting (24428) 24428
arrangements of sealings in combustion engines (17380) 17380
cylinders, pistons or casings, for combustion engines (17380) 17380
physical or chemical processes or apparatus in general (13321) 13321
lubricating (13208) 13208
separation (13117) 13117
general tagging of cross-sectional technologies spanning over several sections of the ipc (11720) 11720
general tagging of new technological developments (11720) 11720
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (11720) 11720
supplying combustion engines in general, with combustiblemixtures or constituents thereof (11357) 11357
chemistry (10731) 10731
metallurgy (10693) 10693
cooling of internal-combustion engines (10546) 10546
cooling of machines or engines in general (10546) 10546
lubricants (10096) 10096
fuels (10029) 10029
peat (9991) 9991
petroleum, gas or coke industries (9991) 9991
technical gases containing carbon monoxide (9991) 9991
lubricating compositions (9828) 9828
use of chemical substances either alone or as lubricatingingredients in a lubricating composition (9828) 9828
cyclically operating valves for machines or engines (9105) 9105
physics (6533) 6533
controlling combustion engines (6200) 6200
technical subjects covered by former uspc (6081) 6081
technologies or applications for mitigation or adaptation againstclimate change (5904) 5904
positive displacement machines for liquids (5722) 5722
pumps for liquids or elastic fluids (5722) 5722
climate change mitigation technologies related totransportation (5686) 5686
gearing (5662) 5662
indexing scheme associated with subclass c10m relating to lubricatingcompositions (5132) 5132
testing (5056) 5056
measuring (5028) 5028
bearings (4416) 4416
shafts (4394) 4394
elements or crankshaft mechanisms (4377) 4377
flexible shafts (4377) 4377
rotary bodies other than gearing elements (4377) 4377
technical subjects covered by former us classification (4023) 4023
vehicles in general (3882) 3882
valves (2920) 2920
pistons (2911) 2911
cylinders (2909) 2909
actuating-floats (2896) 2896
cocks (2896) 2896
devices for venting or aerating (2896) 2896
taps (2896) 2896
sealings (2884) 2884
pumps (2758) 2758
rotary-piston, or oscillating-piston, positive-displacementmachines for liquids (2682) 2682
rotary-piston, or oscillating-piston, positive-displacementpumps (2682) 2682
measuring volume, volume flow, mass flow or liquidlevel (2393) 2393
metering by volume (2393) 2393
technical subjects covered by former uspc cross-reference artcollections [xracs] and digests (2300) 2300
heat exchange in general (2255) 2255
centrifugal apparatus or machines for carrying-out physical orchemical processes (2227) 2227
non-positive displacement machines or engines, e.g. steamturbines (2224) 2224
arrangement or mounting of plural diverse prime-movers invehicles (2144) 2144
arrangement or mounting of propulsion units or oftransmissions in vehicles (2144) 2144
arrangements in connection with cooling, air intake, gasexhaust or fuel supply of propulsion units, in vehicles (2144) 2144
auxiliary drives for vehicles (2144) 2144
instrumentation or dashboards for vehicles (2144) 2144
indexing schemes relating to engines or pumps in varioussubclasses of classes f01-f04 (1996) 1996
gas-flow silencers or exhaust apparatus for internalcombustion engines (1968) 1968
gas-flow silencers or exhaust apparatus for machines orengines in general (1968) 1968
starting aids for such engines, not otherwise providedfor (1817) 1817
starting of combustion engines (1817) 1817
heat-exchange apparatus, not provided for in another subclass,in which the heat-exchange media do not come into direct contact (1804) 1804
centrifuges (1750) 1750
details of heat-exchange and heat-transfer apparatus, ofgeneral application (1720) 1720
electricity (1703) 1703
investigating or analysing materials by determining theirchemical or physical properties (1680) 1680
natural gas (1567) 1567
liquefied petroleum gas (1540) 1540
related equipment (1540) 1540
ships or other waterborne vessels (1540) 1540
adding materials to fuels or fires to reduce smoke orundesirable deposits or to facilitate soot removal (1539) 1539
firelighters (1539) 1539
fuels not otherwise provided for (1539) 1539
synthetic natural gas obtained by processes not covered bysubclasses c10g, c10k (1539) 1539
air intakes for jet-propulsion plants (1510) 1510
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English (110535) 110535
German (21513) 21513
French (18659) 18659
Chinese (16035) 16035
Japanese (5263) 5263
Korean (5152) 5152
Spanish (1768) 1768
Russian (1501) 1501
Portuguese (1153) 1153
Italian (742) 742
Swedish (642) 642
Danish (348) 348
Finnish (297) 297
Dutch (156) 156
Norwegian (150) 150
Polish (108) 108
Czech (53) 53
Romanian (53) 53
Turkish (49) 49
Ukrainian (47) 47
Hungarian (28) 28
Indonesian (19) 19
Greek (10) 10
Slovenian (9) 9
Slovak (7) 7
Estonian (5) 5
Hebrew (5) 5
Arabic (4) 4
Bulgarian (4) 4
Croatian (4) 4
Icelandic (4) 4
Lithuanian (1) 1
Serbian (1) 1
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