Top IPC subclasses
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1
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H01B
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4
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cablesconductorsinsulatorsselection of materials for their conductive, insulating, or dielectric pro
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2
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D21H
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3
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pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertre
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3
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G01L
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2
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measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
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4
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G01R
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1
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Measuring electric variables; measuring magnetic variables
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5
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B41M
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1
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printing, duplicating, marking, or copying processescolour printing
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6
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H01L
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1
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Semiconductor devices; electric solid state devices not otherwise provided for
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7
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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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8
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B42D
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1
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booksbook coversloose leavesprinted matter of special format or style not otherwise provided fordevi
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9
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G07D
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1
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sorting, testing, changing, delivering, or otherwise handling coinstesting or changing paper currenc
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