Title:
Vacuum cleaner construction
United States Patent 2221572

Inventors:
Brock, Clarence A.
Hutchens, Nodiah E.
Publication Date:
11/12/1940
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Assignee:
REXAIR INC
Primary Class:
96/333
Other Classes:
55/317, 261/91, 261/24, 55/408, 417/357
International Classes:
A47L9/16; A47L9/18; A47L9/22; A47L9/10