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United States Patent 1872454
Inventors:
Peter, Horn
Frank, Zipp
Publication Date:
08/16/1932
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Download PDF 1872454
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Assignee:
Peter, Horn
Frank, Zipp
Primary Class:
124/7
Other Classes:
473/578, 273/317, 273/399, 473/585
International Classes:
A63F9/02