Top IPC subclasses
1
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C10L
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5
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fuels not otherwise provided fornatural gassynthetic natural gas obtained by processes not covered b
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2
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E01H
|
1
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street cleaningcleaning of permanent wayscleaning beachescleaning landdispersing fog in general
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3
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E01C
|
1
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construction of, or surfaces for, roads, sports grounds, or the likemachines or auxiliary tools for
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