Top IPC subclasses
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1
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C02F
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2
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Treatment of water, waste water, sewage, or sludge
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2
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A61L
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2
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Methods or apparatus for sterilising materials or objects in general; disinfection, sterilisation, or deodorisation of air; chemical aspects of bandages, dressings, absorbent pads, or surgical articles; materials for bandages, dressings, absorbent pads, or surgical articles
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3
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C01B
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1
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non-metallic elementscompounds thereof
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4
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A01K
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1
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animal husbandrycare of birds, fishes, insectsfishingrearing or breeding animals, not otherwise prov
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