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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2201/00
Aspects of control systems of elevators
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B66B2201/40
Details of the change of control mode
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B66B2201/46
Switches or switchgear
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B66B2201/4607
Call registering systems
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B66B2201/4653
wherein the call is registered using portable devices
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