Fan for furnace hot air pipes
United States Patent 1886841

Inventors:
Searles, Alva L.
Publication Date:
11/08/1932
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Assignee:
Searles, Alva L.
Primary Class:
454/319
Other Classes:
123/41.040, 454/329, 454/338
International Classes:
F24F7/06; F24F13/15