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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A47C
CHAIRS; SOFAS; BEDS
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7/00
Parts, details, or accessories of chairs or stools
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A47C7/35
Combinations of different types of springs; Adjustable springs; Attachment of springs to other springs or to; the base; frame; ; Springs for seat parts not provided for in other groups of this subclass
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