Top IPC subclasses
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1
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C02F
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12
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Treatment of water, waste water, sewage, or sludge
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2
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C05F
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4
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organic fertilisers not covered by subclasses , , e.g. fertilisers from waste or refuse
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3
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A01B
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4
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Soil working in agriculture or forestry; parts, details, or accessories of agricultural machines or implements, in general
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4
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B09B
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1
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disposal of solid waste
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5
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C09K
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1
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materials for applications not otherwise provided forapplications of materials not otherwise provide
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6
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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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7
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G01B
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1
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measuring length, thickness, or similar linear dimensionsmeasuring anglesmeasuring areasmeasuring ir
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8
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A01G
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1
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Horticulture; cultivation of vegetables, flowers, rice, fruit, vines, hops, or seaweed; forestry; watering
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