Top IPC subclasses
1
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D21H
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2
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pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertre
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2
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G07D
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2
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sorting, testing, changing, delivering, or otherwise handling coinstesting or changing paper currenc
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3
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G07F
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1
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coin-freed or like apparatus
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4
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G06K
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1
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Recognition of data; presentation of data; record carriers; handling record carriers
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