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Title:
Rotary pump machine
United States Patent 1897190
Inventors:
Thomas, Eyston George Edward
Application Number:
US53176331A
Publication Date:
02/14/1933
Filing Date:
04/21/1931
Assignee:
POWERPLUS 1927 LTD
Primary Class:
Other Classes:
92/136
International Classes:
F04B1/113
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