Rubber sponge
United States Patent 1816108

Inventors:
Blumenfeld, Mose E.
Publication Date:
07/28/1931
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Assignee:
Blumenfeld, Mose E.
Primary Class:
15/244.400
Other Classes:
15/244.100, 51/299, 15/209.100, 15/208, 601/138, 15/215
International Classes:
A47L13/16