Title:
Knock-down door frame
United States Patent 2869695
US Patent References:
Metallic door frame
- - 1606780

Jamb
- - 2581750

Pressed steel doorframe construction
- - 2601164


Inventors:
Herr, Theodore Z.
Caldwell, Charles W.
Publication Date:
01/20/1959
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Assignee:
AMERICAN WELDING & MFG COMPANY
Primary Class:
52/211
Other Classes:
52/656.400, 52/848, 52/364, 52/800.180
International Classes:
E06B1/52; E06B3/988; E06B3/96