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United States Patent 2217486
Inventors:
Larson, Homer W.
Publication Date:
10/08/1940
View Patent Images:
Download PDF 2217486
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Assignee:
WESTERN ELECTRIC CO
Primary Class:
72/331
Other Classes:
72/404, 72/390.400, 72/409.010, 72/384
International Classes:
B23D29/02
;
B23D29/00