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United States Patent 2437442
US Patent References:
/0174265.html
- - 0174265

/0619543.html
- - 0619543

/1274023.html
- - 1274023


Inventors:
Siwiec, Eugene S.
Publication Date:
03/09/1948
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Assignee:
Siwiec, Eugene S.
Primary Class:
446/270
Other Classes:
280/1.140
International Classes:
A63H5/00