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United States Patent 1801866
Inventors:
Jennings, Oliver S.
Publication Date:
04/21/1931
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Download PDF 1801866
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Assignee:
WESTINGHOUSE ELECTRIC & MFG CO
Primary Class:
200/446
Other Classes:
200/302.100, 361/646, 200/337
International Classes:
H01H21/42
;
H01H21/00