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United States Patent 1780256
Inventors:
Walther, Walss
Publication Date:
11/04/1930
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Download PDF 1780256
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Assignee:
Walther, Walss
Primary Class:
273/280
Other Classes:
273/142R, 273/243, 273/284, 273/236, 273/157R
International Classes:
A63F3/02