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United States Patent 2286427
Inventors:
Levensten, Harry L.
Publication Date:
06/16/1942
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Download PDF 2286427
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Assignee:
Levensten, Harry L.
Primary Class:
312/222
Other Classes:
292/177, 292/146, 312/902, 190/5, 312/290
International Classes:
B25H3/02
;
B25H3/00