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United States Patent 1815921

Inventors:
Samuel, Lapof
Publication Date:
07/28/1931
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Assignee:
BAR RAY PRODUCTS INC
Primary Class:
250/517.100
Other Classes:
52/432, 52/408, 976/DIG.335, 52/405.100
International Classes:
E04B1/92; G21F3/00