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United States Patent 2311542
Inventors:
Dumville, Holme Edward
Publication Date:
02/16/1943
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Download PDF 2311542
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Assignee:
Dumville, Holme Edward
Primary Class:
5/609
Other Classes:
601/86, 74/86, 5/610, 5/109, 601/87
International Classes:
A61G7/002