Top IPC subclasses
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1
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G03G
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19
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Electrography; electrophotography; magnetography
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2
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H05H
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5
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plasma techniqueproduction of accelerated electrically- charged particles or of neutronsproduction o
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3
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H01L
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3
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Semiconductor devices; electric solid state devices not otherwise provided for
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4
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C08F
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3
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macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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5
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G01B
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3
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measuring length, thickness, or similar linear dimensionsmeasuring anglesmeasuring areasmeasuring ir
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6
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G03H
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2
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holographic processes or apparatus
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7
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C23C
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2
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Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
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8
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B01D
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1
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Separation
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9
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C07C
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1
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Acyclic or carbocyclic compounds
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10
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C01B
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1
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non-metallic elementscompounds thereof
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11
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G11B
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1
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information storage based on relative movement between record carrier and transducer
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12
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G01N
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1
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Investigating or analysing materials by determining their chemical or physical properties
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13
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G03B
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1
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apparatus or arrangements for taking photographs or for projecting or viewing themapparatus or arran
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14
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G09B
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1
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educational or demonstration appliancesappliances for teaching, or communicating with, the blind, de
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15
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G03C
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1
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photosensitive materials for photographic purposesphotographic processes, e.g. cine, x-ray, colour,
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