Retiring cam mechanism for unlatching elevator doors
United States Patent 2520137
US Patent References:
/0910654.html
- - 0910654

Elevator-gate-control means
- - 1799600


Inventors:
Erler, Fred M.
Publication Date:
08/29/1950
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Assignee:
Erler, Fred M.
Primary Class:
187/331
International Classes:
B66B13/20; B66B13/14