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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1/00
Control systems of elevators in general
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B66B1/02
Control systems without regulation, i.e. without retroactive action
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B66B1/14
with devices, e.g. push-buttons, for indirect control of movements
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B66B1/22
with means for taking account of delayed calls
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