Metal frame for openings
United States Patent 1697300

Inventors:
Baum, Isaac A.
Publication Date:
01/01/1929
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Assignee:
Baum, Isaac A.
Primary Class:
52/216
Other Classes:
52/257
International Classes:
E06B1/58; E06B1/60; E06B3/988; E06B1/56; E06B3/96