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Patent (958) 958
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physics (341) 341
science & technology (334) 334
performing operations (252) 252
transporting (252) 252
chemistry (173) 173
heating (151) 151
mechanical engineering (151) 151
blasting (150) 150
lighting (149) 149
weapons (149) 149
physical sciences (148) 148
technology (145) 145
electricity (144) 144
life sciences & biomedicine (116) 116
testing (113) 113
measuring (112) 112
metallurgy (111) 111
fixed constructions (99) 99
materials science (97) 97
materials science, multidisciplinary (88) 88
calculating (81) 81
computing (81) 81
counting (81) 81
machines or engines for liquids (73) 73
or a reactive propulsive thrust, not otherwise provided for (73) 73
producing mechanical power (73) 73
wind, spring weight and miscellaneous motors (73) 73
science & technology - other topics (66) 66
physics, applied (64) 64
wind motors (64) 64
human necessities (58) 58
optics (58) 58
electric communication technique (56) 56
humans (50) 50
investigating or analysing materials by determining theirchemical or physical properties (50) 50
conversion or distribution of electric power (47) 47
generation (47) 47
nanoscience & nanotechnology (47) 47
analysis (44) 44
engineering (40) 40
data processing systems or methods, specially adapted foradministrative, commercial, financial, managerial, supervisoryor forecasting purposes (38) 38
electric digital data processing (38) 38
systems or methods specially adapted for administrative,commercial, financial, managerial, supervisory or forecastingpurposes, not otherwise provided for (38) 38
physical or chemical processes or apparatus in general (37) 37
mining (36) 36
engineering elements and units (35) 35
general measures for producing and maintaining effectivefunctioning of machines or installations (35) 35
thermal insulation in general (35) 35
earth drilling (33) 33
mechanical metal-working without essentially removingmaterial (33) 33
punching metal (33) 33
chemistry, physical (32) 32
basic electric elements (30) 30
male (30) 30
transmission of digital information, e.g. telegraphiccommunication (29) 29
female (28) 28
general tagging of cross-sectional technologies spanning over several sections of the ipc (28) 28
general tagging of new technological developments (28) 28
hygiene (28) 28
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (28) 28
conveying (27) 27
handling thin or filamentary material (27) 27
medical or veterinary science (27) 27
packing (27) 27
storing (27) 27
technologies or applications for mitigation or adaptation againstclimate change (27) 27
machine tools (26) 26
separation (26) 26
animals (24) 24
cleaning (24) 24
cleaning in general (24) 24
controlling (24) 24
metal-working not otherwise provided for (24) 24
prevention of fouling in general (24) 24
regulating (24) 24
oncology (23) 23
checking-devices (22) 22
agriculture (21) 21
chemistry, multidisciplinary (20) 20
earth drilling, e.g. deep drilling (20) 20
gene expression (20) 20
measuring angles (20) 20
measuring areas (20) 20
measuring irregularities of surfaces or contours (20) 20
measuring length, thickness or similar lineardimensions (20) 20
obtaining oil, gas, water, soluble or meltable materials or aslurry of minerals from wells (20) 20
foundations (19) 19
hydraulic engineering (19) 19
installation of electric cables or lines, or of combinedoptical and electric cables or lines (19) 19
proteins (19) 19
quantum dots (19) 19
rolling of metal (19) 19
soil shifting (19) 19
alloys (18) 18
circuit arrangements or systems for supplying or distributingelectric power (18) 18
diagnosis (18) 18
ferrous or non-ferrous alloys (18) 18
systems for storing electric energy (18) 18
treatment of alloys or non-ferrous metals (18) 18
basic electronic circuitry (17) 17
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English (1672) 1672
Chinese (997) 997
French (17) 17
Italian (4) 4
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