Title:
Sheet-metal door
United States Patent 1574493

Inventors:
Leonard, Elof R.
Publication Date:
02/23/1926
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Assignee:
Leonard, Elof R.
Primary Class:
49/501
Other Classes:
126/190, 70/451, 52/802.100
International Classes:
E06B3/72; E06B3/88; E06B3/988; E06B3/70; E06B3/96