Hollow metal door and the like
United States Patent 1857076

Inventors:
Zenker, Oscar E.
Publication Date:
05/03/1932
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Assignee:
Zenker, Oscar E.
Primary Class:
52/784.100
Other Classes:
52/455, 52/784.160, 52/843
International Classes:
E06B3/72; E06B3/96