Top IPC subclasses
1
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C05F
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3
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organic fertilisers not covered by subclasses , , e.g. fertilisers from waste or refuse
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2
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A01C
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1
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Planting; sowing; fertilising
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3
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A01B
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1
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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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