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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A47C7/025
Springs not otherwise provided for in A47C7/22 - A47C7/35
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A47C7/028
with wooden springs, e.g. slated type
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