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United States Patent 1916067
Inventors:
Naidor, George P.
Publication Date:
06/27/1933
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Download PDF 1916067
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Assignee:
Naidor, George P.
Primary Class:
36/19A
Other Classes:
12/142A, 36/19R, 36/18, 36/9R
International Classes:
A43B3/10