Title:
Bag pressure indicator for suction cleaners
United States Patent 2114105

Inventors:
Gerber, Dale C.
Publication Date:
04/12/1938
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Assignee:
HOOVER CO
Primary Class:
116/271
Other Classes:
116/266, 55/DIG.034, 15/246.200, 15/DIG.011, 116/272, 15/351
International Classes:
A47L9/19; A47L9/10