Patent classifications
A
HUMAN NECESSITIES
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A47
FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
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A47L
DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
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A47L23/22
Devices or implements resting on the floor for removing mud, dirt, or dust from footwear
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A47L23/24
Rigid cleaning-gratings; Tread plates or scrapers for cleaning the soles of footwear
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