US Patent 8191970 Backrest device in a chair
Patent 8191970 was granted and assigned to Okamura on June, 2012 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
November 2, 2006
Date of Patent
June 5, 2012
Patent Application Number
12092290
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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