Title:
Automatic door tightener
Document Type and Number:
United States Patent 1900328
Inventors:
Robert, Boggs
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Publication Date:
03/07/1933
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Referenced by:
Export Citation:
Assignee:
Robert, Boggs
Primary Class:
Other Classes:
292/165, 292/61
International Classes:
E05C5/04; E05C5/00