Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B66
HOISTING; LIFTING; HAULING
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B66B
ELEVATORS; ESCALATORS OR MOVING WALKWAYS
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13/00
Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
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B66B13/12
Arrangements for effecting simultaneous opening or closing of cage and landing doors
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