Signal means for suction cleaners
United States Patent 2300705

Inventors:
Schott, Howard H.
Publication Date:
11/03/1942
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Assignee:
LANDERS FRARY & CLARK
Primary Class:
340/617
Other Classes:
15/339, 340/679, 55/DIG.034, 340/666, 200/85R, 15/DIG.011
International Classes:
A47L9/19; A47L9/10