Title:
Positive displacement pump
United States Patent 2308974

Inventors:
Harper, Lyndus E.
Publication Date:
01/19/1943
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Assignee:
Harper, Lyndus E.
Primary Class:
417/510
Other Classes:
92/13.700, 600/16, 417/383
International Classes:
F04B7/00; F04B9/04; F04B43/02; F04B43/067; F04B49/12; F04B9/02; F04B43/06