Title:
Method of and apparatus for operating the doors of elevator installations
United States Patent 1911792


Inventors:
Boedtcher, Franz A.
Application Number:
US33576629A
Publication Date:
05/30/1933
Filing Date:
01/29/1929
Assignee:
OTIS ELEVATOR CO
Primary Class:
Other Classes:
49/65
International Classes:
B66B13/08; B66B13/12
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