Patent classifications
A
HUMAN NECESSITIES
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A01
AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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A01B
SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
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A01B49/04
Combinations of soil-working tools with non-soil-working tools, e.g. planting tools
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A01B49/06
for sowing or fertilising
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