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Title:
Fireproof shutter
United States Patent 1707287
Inventors:
Tomitaro, Sudzki
Publication Date:
04/02/1929
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Download PDF 1707287
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Assignee:
Tomitaro, Sudzki
Primary Class:
160/232
Other Classes:
160/235
International Classes:
E06B9/15
;
E06B9/17
;
E06B9/11