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United States Patent 2563191
US Patent References:
Indicator
- - 2293138


Inventors:
Russ, Raymond W.
Publication Date:
08/07/1951
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Assignee:
Russ, Raymond W.
Primary Class:
250/462.100
Other Classes:
359/436, 33/565, 33/429, 33/493
International Classes:
B43L7/02; B43L7/00