Booster fan
United States Patent 2011421

Inventors:
Searles, Alvah L.
Publication Date:
08/13/1935
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Assignee:
Searles, Alvah L.
Primary Class:
126/110R
Other Classes:
415/129, 415/126, 415/201, 454/338, 415/148
International Classes:
F24D5/02; F24D5/00