Crack-cleaning suction attachment for a vacuum cleaner of the upright type having an on-the-floor, downwardly directed, main suction and cleaning nozzle
United States Patent 3377647

Inventors:
Hill, Robert D.
Hosmer, Andrew J.
Publication Date:
04/16/1968
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Primary Class:
15/337
Other Classes:
15/416, 15/415.100
International Classes:
A47L9/02