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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A01C7/08
Broadcast seeders; Seeders depositing seeds in rows
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A01C7/12
Seeders with feeding wheels
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A01C7/121
for sowing seeds of different sizes
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