Vacuum cleaning apparatus
United States Patent 1455116

Inventors:
Lumley, Frank E.
Publication Date:
05/15/1923
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Assignee:
Lumley, Frank E.
Primary Class:
15/419
Other Classes:
55/350.100, 55/DIG.008, 251/321, 55/309, 15/314, 55/DIG.003, 137/614.110, 55/344
International Classes:
A47L5/38; A47L9/02; A47L5/22