Top IPC subclasses
1
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G03G
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1
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Electrography; electrophotography; magnetography
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2
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F01N
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1
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gas-flow silencers or exhaust apparatus for machines or engines in generalgas-flow silencers or exha
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3
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B65D
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1
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Containers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers; accessories, closures, or fittings therefor; packaging elements; packages
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