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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A47C7/36
Supports for the head or the back
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A47C7/46
with special, e.g. adjustable; , lumbar region support; profile; "Ackerblom" profile chairs
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A47C7/467
adjustable by fluid means
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