Title:
Vacuum pump
United States Patent 1521270


Inventors:
Bogdanoff, Paul G.
Application Number:
US34772119A
Publication Date:
12/30/1924
Filing Date:
12/27/1919
Assignee:
Bogdanoff, Paul G.
Primary Class:
Other Classes:
417/174
International Classes:
F04F5/42
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