Title:
Fireproof shutter
Document Type and Number:
United States Patent 1707287
Inventors:
Tomitaro, Sudzki
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Publication Date:
04/02/1929
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Assignee:
Tomitaro, Sudzki
Primary Class:
Other Classes:
160/235
International Classes:
E06B9/15; E06B9/17; E06B9/11