Title:
Deep-well pump
United States Patent 1767879


Inventors:
Grafenstatt, Emil S.
Application Number:
US9357626A
Publication Date:
06/24/1930
Filing Date:
03/10/1926
Assignee:
Grafenstatt, Emil S.
Primary Class:
Other Classes:
91/218
International Classes:
F04B47/04
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