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Patent (269884) 269884
Journal Article (429) 429
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Book Chapter (49) 49
Newspaper Article (42) 42
Trade Publication Article (25) 25
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heating (269914) 269914
mechanical engineering (269892) 269892
blasting (269884) 269884
lighting (269884) 269884
weapons (269884) 269884
furnaces (269667) 269667
kilns (269346) 269346
ovens (269216) 269216
retorts (269203) 269203
furnaces, kilns, ovens, or retorts in general (218764) 218764
open sintering or like apparatus (218764) 218764
details or accessories of furnaces, kilns, ovens, or retorts,in so far as they are of kinds occurring in more than one kindof furnace (140255) 140255
metallurgy (130751) 130751
chemistry (130732) 130732
metallurgy of iron (67938) 67938
performing operations (59732) 59732
transporting (59732) 59732
general tagging of cross-sectional technologies spanning over several sections of the ipc (48454) 48454
general tagging of new technological developments (48454) 48454
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (48454) 48454
technologies or applications for mitigation or adaptation againstclimate change (41338) 41338
climate change mitigation technologies in the production orprocessing of goods (37622) 37622
ferrous or non-ferrous alloys (28531) 28531
treatment of alloys or non-ferrous metals (28531) 28531
general devices for heat treatment of ferrous or non-ferrousmetals or alloys (26511) 26511
making metal malleable by decarburisation, tempering or othertreatments (26511) 26511
modifying the physical structure of ferrous metals (26511) 26511
pretreatment of raw materials (25390) 25390
production and refining of metals (25390) 25390
electricity (25041) 25041
manufacture of iron or steel (24769) 24769
slag (24406) 24406
ceramics (24387) 24387
cements (24381) 24381
concrete (24378) 24378
refractories (24378) 24378
artificial stone (24356) 24356
compositions thereof, e.g. mortars, concrete or like buildingmaterials (24355) 24355
lime, magnesia (24355) 24355
treatment of natural stone (24355) 24355
combustion apparatus (22650) 22650
combustion processes (22650) 22650
physical or chemical processes or apparatus in general (22579) 22579
processing of pig-iron, e.g. refining, manufacture ofwrought-iron or steel (21944) 21944
treatment in molten state of ferrous alloys (21944) 21944
electric techniques not otherwise provided for (17551) 17551
electric heating (16148) 16148
electric lighting not otherwise provided for (16148) 16148
casting (14034) 14034
powder metallurgy (14033) 14033
chemical or physical processes, e.g. catalysis or colloidchemistry (13565) 13565
their relevant apparatus (13565) 13565
physics (9567) 9567
technical subjects covered by former uspc (9132) 9132
casting of metals (9110) 9110
casting of other substances by the same processes or devices (9110) 9110
consuming waste products by combustion (8686) 8686
cremation furnaces (8686) 8686
basic electric elements (8228) 8228
engineering elements and units (7861) 7861
general measures for producing and maintaining effectivefunctioning of machines or installations (7861) 7861
thermal insulation in general (7861) 7861
separation (7776) 7776
conveying (7626) 7626
handling thin or filamentary material (7626) 7626
packing (7626) 7626
storing (7626) 7626
glass (7618) 7618
mineral or slag wool (7606) 7606
chemical surface treatment (7467) 7467
coating by vacuum evaporation, by sputtering, by ion implantationor by chemical vapour deposition, in general (7467) 7467
coating material with metallic material (7467) 7467
coating metallic material (7467) 7467
diffusion treatment of metallic material (7467) 7467
inhibiting corrosion of metallic material or incrustation ingeneral (7467) 7467
heat exchange in general (7349) 7349
manufacture, shaping, or supplementary processes (7314) 7314
coating by vacuum evaporation, by sputtering, by ionimplantation or by chemical vapour deposition, in general (6875) 6875
surface treatment of metallic material by diffusion into thesurface, by chemical conversion or substitution (6875) 6875
inorganic chemistry (6828) 6828
fuels (6732) 6732
lubricants (6714) 6714
peat (6714) 6714
petroleum, gas or coke industries (6714) 6714
technical gases containing carbon monoxide (6714) 6714
pneumatic tube conveyors (6430) 6430
shop conveyor systems (6430) 6430
transport or storage devices, e.g. conveyors for loading ortipping (6430) 6430
electric solid state devices not otherwise provided for (5666) 5666
semiconductor devices (5666) 5666
drying (5656) 5656
drying solid materials or objects by removing liquid therefrom (5644) 5644
air (5508) 5508
methodsor apparatus for combustion using fluid fuelor solid fuel suspended in (5504) 5504
testing (5426) 5426
measuring (5422) 5422
compounds thereof (5178) 5178
non-metallic elements (5101) 5101
technical subjects covered by former us classification (4823) 4823
technical subjects covered by former uspc cross-reference artcollections [xracs] and digests (4763) 4763
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English (216341) 216341
Chinese (44338) 44338
German (33939) 33939
French (32245) 32245
Korean (8141) 8141
Russian (7936) 7936
Spanish (6180) 6180
Japanese (4964) 4964
Portuguese (3491) 3491
Italian (2105) 2105
Swedish (2085) 2085
Finnish (1367) 1367
Danish (1356) 1356
Norwegian (1108) 1108
Polish (823) 823
Dutch (724) 724
Ukrainian (678) 678
Czech (400) 400
Romanian (299) 299
Turkish (293) 293
Hungarian (158) 158
Slovak (112) 112
Bulgarian (111) 111
Slovenian (109) 109
Indonesian (71) 71
Serbian (65) 65
Icelandic (50) 50
Croatian (45) 45
Arabic (34) 34
Greek (28) 28
Latvian (24) 24
Lithuanian (18) 18
Estonian (15) 15
Hebrew (9) 9
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Moldavian (1) 1
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