Pumping mechanism
United States Patent 1957435

Inventors:
Ottmar, Baur
Publication Date:
05/08/1934
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Assignee:
SIEMENS AG
Primary Class:
123/495
Other Classes:
417/273, 417/494
International Classes:
F02M59/06; F02M59/26; F02M59/30; F02M59/00; F02M59/20