Patent classifications
A
HUMAN NECESSITIES
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A01
AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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A01C
PLANTING; SOWING; FERTILISING
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5/00
Making or covering furrows or holes for sowing, planting or manuring
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A01C5/06
Machines for making or covering drills or furrows for sowing or planting
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