Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 12, 2022
Patent Application Number
17059422
Date Filed
May 29, 2019
Patent Citations Received
Patent Primary Examiner
CPC Code
A backrest for use in a chair includes a back board arranged in a position to abut a back of a seated person on the chair. A first area that is a laterally central area of the back board has a thickness greater than a thickness of a second area of the back board located closer to each of left and right ends of the back board than the first area.
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