Elevator car announcing system
United States Patent 3375491
US Patent References:
Supervisory systems for elevators
- - 2828476

Elevator announcing system
- - 2991448


Inventors:
Hornung, Stephen A.
Riggs, Lloyd L.
Stichweh, James H.
Publication Date:
03/26/1968
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Assignee:
K M WHITE COMPANY INC
Primary Class:
187/396
Other Classes:
360/69, 360/61, 340/328, 369/21, 360/12
International Classes:
B66B3/00