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science & technology (235) 235
chemistry (158) 158
physics (141) 141
technology (135) 135
physical sciences (132) 132
electricity (100) 100
metallurgy (95) 95
transporting (92) 92
performing operations (91) 91
materials science (72) 72
human necessities (68) 68
basic electric elements (65) 65
materials science, multidisciplinary (60) 60
mechanical engineering (57) 57
life sciences & biomedicine (50) 50
engineering (49) 49
testing (49) 49
measuring (48) 48
blasting (46) 46
heating (46) 46
lighting (46) 46
weapons (46) 46
general tagging of cross-sectional technologies spanning over several sections of the ipc (42) 42
general tagging of new technological developments (42) 42
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (42) 42
technologies or applications for mitigation or adaptation againstclimate change (42) 42
fault diagnosis (39) 39
analysis (37) 37
chemistry, physical (36) 36
physics, applied (36) 36
semiconductor devices (34) 34
agriculture (33) 33
science & technology - other topics (33) 33
forestry (31) 31
animal husbandry (30) 30
electric solid state devices not otherwise provided for (30) 30
electrochemistry (30) 30
fishing (30) 30
fixed constructions (30) 30
hunting (30) 30
trapping (30) 30
energy & fuels (29) 29
nanoscience & nanotechnology (29) 29
reduction of greenhouse gas [ghg] emissions, related to energygeneration, transmission or distribution (26) 26
investigating or analysing materials by determining theirchemical or physical properties (25) 25
calculating (23) 23
computing (23) 23
counting (23) 23
humans (22) 22
hygiene (21) 21
medical or veterinary science (21) 21
electric communication technique (20) 20
exact sciences and technology (20) 20
physical or chemical processes or apparatus in general (20) 20
solar cells (20) 20
chemistry, multidisciplinary (19) 19
inorganic chemistry (19) 19
photovoltaic cells (18) 18
organic chemistry (17) 17
processes or means, e.g. batteries, for the direct conversionof chemical into electrical energy (17) 17
cultivation of vegetables, flowers, rice, fruit, vines, hopsor seaweed (16) 16
geology (16) 16
horticulture (16) 16
watering (16) 16
applied sciences (15) 15
ceramics (15) 15
thin films (15) 15
artificial stone (14) 14
cements (14) 14
climate change mitigation technologies in the production orprocessing of goods (14) 14
compositions thereof, e.g. mortars, concrete or like buildingmaterials (14) 14
concrete (14) 14
decomposition (14) 14
dielectric films (14) 14
geosciences, multidisciplinary (14) 14
hand tools (14) 14
lime, magnesia (14) 14
manipulators (14) 14
oncology (14) 14
perovskites (14) 14
polymers (14) 14
portable power-driven tools (14) 14
refractories (14) 14
slag (14) 14
treatment of natural stone (14) 14
vibration (14) 14
capacitors (13) 13
engineering, mechanical (13) 13
entropy (13) 13
female (13) 13
perovskite (13) 13
roller bearings (13) 13
chemical or physical processes, e.g. catalysis or colloidchemistry (12) 12
chemical surface treatment (12) 12
china (12) 12
coating by vacuum evaporation, by sputtering, by ion implantationor by chemical vapour deposition, in general (12) 12
coating material with metallic material (12) 12
coating metallic material (12) 12
diffusion treatment of metallic material (12) 12
electric digital data processing (12) 12
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