US Patent 8998337 Backrest chair, and a sheet material for use thereon

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Patent Jurisdiction

Patent Number

Patent Inventor Names

Seizou Miyamoto0

Date of Patent

April 7, 2015

Patent Application Number

13704237

Date Filed

August 30, 2011

Patent Citations Received

Patent Primary Examiner

Patent abstract

[Problem] To provide a comfortable backrest chair.

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