Title:
Self-lifting car elevator
Document Type and Number:
United States Patent 2538517
Inventors:
Hayden, John G.
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Publication Date:
01/16/1951
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Referenced by:
Export Citation:
Assignee:
Hayden, John G.
Primary Class:
Other Classes:
187/213, 187/212, 74/14
International Classes:
B66F7/04; B66F7/24; E04H6/06; B66F7/00
US Patent References: