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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63/00
Lifting or adjusting devices or arrangements for agricultural machines or implements
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A01B63/14
for implements drawn by animals or tractors
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A01B63/16
with wheels adjustable relatively to the frame
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A01B63/22
operated by hydraulic or pneumatic means
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