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Patent (231729) 231729
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heating (232301) 232301
mechanical engineering (232209) 232209
lighting (231782) 231782
weapons (231733) 231733
blasting (231731) 231731
steam generation (181996) 181996
steam boilers (145131) 145131
methods of steam generation (145066) 145066
steam engines (68238) 68238
engine plants in general (68051) 68051
machines or engines in general (68051) 68051
general tagging of cross-sectional technologies spanning over several sections of the ipc (39731) 39731
general tagging of new technological developments (39731) 39731
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (39731) 39731
auxiliary devices for promoting water circulation withinboilers (33992) 33992
controlling water level (33992) 33992
feed-water supply (33992) 33992
preheating, or accumulating preheated, feed-water (33992) 33992
steam accumulators (33766) 33766
engine plants not otherwise provided for (33765) 33765
engines using special working fluids or cycles (33765) 33765
steam engine plants (33765) 33765
technologies or applications for mitigation or adaptation againstclimate change (32382) 32382
performing operations (26818) 26818
transporting (26818) 26818
combustion processes (26422) 26422
combustion apparatus (26421) 26421
electricity (25560) 25560
combustion engines (23052) 23052
hot-gas or combustion-product engine plants (23051) 23051
heat exchange in general (21147) 21147
non-positive displacement machines or engines, e.g. steamturbines (20672) 20672
generation (20232) 20232
conversion or distribution of electric power (20176) 20176
reduction of greenhouse gas [ghg] emissions, related to energygeneration, transmission or distribution (19188) 19188
ranges (18367) 18367
ventilating (18367) 18367
superheating of steam (17455) 17455
chemistry (17380) 17380
physics (17104) 17104
metallurgy (15806) 15806
physical or chemical processes or apparatus in general (13369) 13369
gas-turbine plants (12116) 12116
air intakes for jet-propulsion plants (12114) 12114
controlling fuel supply in air-breathing jet-propulsion plants (12114) 12114
dynamo-electric machines (11652) 11652
details of heat-exchange and heat-transfer apparatus, ofgeneral application (11239) 11239
heat-exchange apparatus, not provided for in another subclass,in which the heat-exchange media do not come into direct contact (10653) 10653
fluid heaters, e.g. water or air heaters, having heatgenerating means, in general (10573) 10573
gas-flow silencers or exhaust apparatus for internalcombustion engines (9839) 9839
gas-flow silencers or exhaust apparatus for machines orengines in general (9839) 9839
air (9621) 9621
separation (9543) 9543
methodsor apparatus for combustion using fluid fuelor solid fuel suspended in (9533) 9533
engineering elements and units (9191) 9191
general measures for producing and maintaining effectivefunctioning of machines or installations (9191) 9191
thermal insulation in general (9191) 9191
technical subjects covered by former uspc (8971) 8971
climate change mitigation technologies related totransportation (8672) 8672
flues (7939) 7939
removal or treatment of combustion products or combustionresidues (7913) 7913
science & technology (7858) 7858
nuclear engineering (7824) 7824
climate change mitigation technologies in the production orprocessing of goods (7811) 7811
nuclear physics (7535) 7535
technology (7012) 7012
machines or engines for liquids (6435) 6435
or a reactive propulsive thrust, not otherwise provided for (6435) 6435
producing mechanical power (6435) 6435
wind, spring weight and miscellaneous motors (6435) 6435
positive displacement machines for liquids (6081) 6081
pumps for liquids or elastic fluids (6081) 6081
indexing schemes relating to engines or pumps in varioussubclasses of classes f01-f04 (6008) 6008
fuels (6001) 6001
human necessities (5675) 5675
combustion engines in general (5622) 5622
internal-combustion piston engines (5622) 5622
technical subjects covered by former us classification (5604) 5604
testing (5479) 5479
measuring (5343) 5343
indexing scheme for aspects relating tonon-positive-displacement machines or engines, gas-turbines orjet-propulsion plants (5227) 5227
nuclear reactors (5099) 5099
lubricants (4899) 4899
peat (4893) 4893
petroleum, gas or coke industries (4889) 4889
technical gases containing carbon monoxide (4889) 4889
cooling of internal-combustion engines (4876) 4876
cooling of machines or engines in general (4876) 4876
consuming waste products by combustion (4693) 4693
cremation furnaces (4693) 4693
steam electric power generation (4489) 4489
control or regulation of electric motors, electric generatorsor dynamo-electric converters (4459) 4459
controlling transformers, reactors or choke coils (4459) 4459
chemical or physical processes, e.g. catalysis or colloidchemistry (4404) 4404
their relevant apparatus (4404) 4404
furnaces (4344) 4344
air supply (4334) 4334
draught-inducing (4334) 4334
supplying non-combustible liquid or gas (4334) 4334
basic electric elements (4303) 4303
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Engineering & Comp. Sci. - Stacks (53) 53
UTL at Downsview - May be requested (15) 15
Online Resources - Online (14) 14
Robarts - Stacks (9) 9
Gerstein Science - Stacks (7) 7
Engineering & Comp. Sci. - May be requested in 6-10 wks (5) 5
UofT at Scarborough - Stacks (5) 5
Collection Dvlpm't (Acquisitions) - Closed Orders (4) 4
Collection Dvlpm't (Acquisitions) - Vendor file (4) 4
UofT at Mississauga - Stacks (3) 3
Engineering & Comp. Sci. - Periodical Stacks (2) 2
Robarts - Government Pubs (2) 2
Royal Ontario Museum - Stacks (2) 2
St. Michael's College (John M. Kelly) - 2nd Floor (2) 2
Thomas Fisher Rare Book - Rare Book (2) 2
Victoria University E.J. Pratt - Stacks (2) 2
Engineering & Comp. Sci. - Cancelled Order (1) 1
UofT Schools - Stacks (1) 1
Victoria University E.J. Pratt - Rare Book (1) 1
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English (204210) 204210
Chinese (39851) 39851
French (33479) 33479
German (29314) 29314
Korean (6759) 6759
Japanese (6659) 6659
Russian (5168) 5168
Spanish (3783) 3783
Swedish (1611) 1611
Finnish (1522) 1522
Portuguese (1254) 1254
Italian (1160) 1160
Danish (928) 928
Dutch (546) 546
Polish (516) 516
Norwegian (419) 419
Czech (256) 256
Ukrainian (196) 196
Turkish (151) 151
Hungarian (107) 107
Romanian (99) 99
Bulgarian (61) 61
Slovenian (56) 56
Greek (54) 54
Slovak (44) 44
Croatian (38) 38
Arabic (36) 36
Indonesian (33) 33
Hebrew (31) 31
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Lithuanian (19) 19
Estonian (18) 18
Latvian (7) 7
Icelandic (4) 4
Moldavian (3) 3
Afrikaans (2) 2
Urdu (2) 2
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Chamorro (1) 1
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