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science & technology (219) 219
physics (175) 175
life sciences & biomedicine (169) 169
chemistry (159) 159
performing operations (155) 155
transporting (155) 155
humans (120) 120
metallurgy (106) 106
electricity (96) 96
male (92) 92
cladding or plating by soldering or welding (74) 74
cutting by applying heat locally, e.g. flame cutting (74) 74
machine tools (74) 74
metal-working not otherwise provided for (74) 74
soldering or unsoldering (74) 74
welding (74) 74
working by laser beam (74) 74
female (72) 72
exact sciences and technology (64) 64
optics (62) 62
biological and medical sciences (60) 60
cinematography (56) 56
electrography (56) 56
holography (56) 56
photography (56) 56
optical elements, systems, or apparatus (53) 53
fixed constructions (49) 49
adult (48) 48
physical sciences (48) 48
basic electric elements (47) 47
blasting (45) 45
heating (45) 45
lighting (45) 45
mechanical engineering (45) 45
medical sciences (45) 45
weapons (45) 45
neurosciences & neurology (44) 44
animals (42) 42
calculating (40) 40
computing (40) 40
counting (40) 40
aged (39) 39
human necessities (39) 39
electric communication technique (38) 38
electric digital data processing (36) 36
middle aged (36) 36
measuring (35) 35
metallurgy of iron (35) 35
testing (35) 35
accessories therefor (33) 33
apparatus or arrangements employing analogous techniques usingwaves other than optical waves (32) 32
apparatus or arrangements for taking photographs or forprojecting or viewing them (32) 32
neurosciences (32) 32
analytical chemistry (31) 31
chromatographic methods and physical methods associated with chromatography (31) 31
neurology (30) 30
other chromatographic methods (30) 30
engineering elements and units (29) 29
general measures for producing and maintaining effectivefunctioning of machines or installations (29) 29
thermal insulation in general (29) 29
agriculture (27) 27
analysis (26) 26
conveying (26) 26
handling thin or filamentary material (26) 26
microbiology (26) 26
packing (26) 26
storing (26) 26
mechanical metal-working without essentially removingmaterial (25) 25
pictorial communication, e.g. television (25) 25
punching metal (25) 25
applied sciences (24) 24
foundations (24) 24
hydraulic engineering (24) 24
soil shifting (24) 24
combustion engines (23) 23
compositions based thereon (23) 23
hot-gas or combustion-product engine plants (23) 23
organic macromolecular compounds (23) 23
their preparation or chemical working-up (23) 23
animal husbandry (22) 22
apparatus specially adapted therefor (22) 22
chemistry, analytical (22) 22
fishing (22) 22
forestry (22) 22
hunting (22) 22
materials therefor (22) 22
originals therefor (22) 22
photomechanical production of textured or patterned surfaces,e.g. for printing, for processing of semiconductordevices (22) 22
trapping (22) 22
auxiliary operations used in connection with metal-workingwithout essentially removing material (21) 21
manufacture of metal sheets, wire, rods, tubes or profiles,otherwise than by rolling (21) 21
handling thin or filamentary material, e.g. sheets, webs,cables (20) 20
pregnancy (20) 20
clinical neurology (19) 19
dredging (19) 19
electric solid state devices not otherwise provided for (19) 19
general tagging of cross-sectional technologies spanning over several sections of the ipc (19) 19
general tagging of new technological developments (19) 19
processing of pig-iron, e.g. refining, manufacture ofwrought-iron or steel (19) 19
semiconductor devices (19) 19
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