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United States Patent 2121654
Inventors:
Donchian, Paul S.
Publication Date:
06/21/1938
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Download PDF 2121654
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Assignee:
Donchian, Paul S.
Primary Class:
220/574
Other Classes:
220/604, 52/DIG.010
International Classes:
A47G19/02
;
A47G19/00