Title:
Pump or compressor
Document Type and Number:
United States Patent 1789842
Inventors:
Rolaff, Walter G. E.
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Publication Date:
01/20/1931
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Assignee:
Rolaff, Walter G. E.
Primary Class:
Other Classes:
418/248, 418/57, 418/111
International Classes:
F01C21/10; F01C21/00