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United States Patent 2997226
US Patent References:
/0241523.html
- - 0241523
/0635045.html
- - 0635045
/0815502.html
- - 0815502
/1264565.html
- - 1264565
Inventors:
Morris, Dana L.
Publication Date:
08/22/1961
View Patent Images:
Download PDF 2997226
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Assignee:
Morris, Dana L.
Primary Class:
229/92.800
International Classes:
B42D15/04
Foreign References:
FR731117A
GB681267A