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United States Patent 1833305

Inventors:
Rathbun, Merrill L.
Publication Date:
11/24/1931
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Assignee:
Rathbun, Merrill L.
Primary Class:
217/57
Other Classes:
16/DIG.019, 206/819, 220/829, 217/5, 220/843
International Classes:
E05D1/04; E05D1/00