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United States Patent 1815006

Inventors:
Horsting, Bernard F.
Leppla, George C.
Publication Date:
07/14/1931
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Assignee:
Horsting, Bernard F.
Leppla, George C.
Primary Class:
24/498
Other Classes:
24/509, 24/507
International Classes:
C14B1/26; C14B1/00