Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B66
HOISTING; LIFTING; HAULING
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B66D
CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
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1/00
Rope, cable, or chain winding mechanisms; Capstans
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B66D1/60
adapted for special purposes
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B66D1/7489
having a particular use, e.g. rope ascenders
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