USD540579SActiveUtility

Chair backrest

68
Assignee: SU TUNG-HUAPriority: Aug 18, 2006Filed: Aug 18, 2006Granted: Apr 17, 2007
Est. expiryAug 18, 2026(~0 yrs left)· nominal 20-yr term from priority
Inventors:Tung-Hua Su
68
PatentIndex Score
15
Cited by
16
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a chair backrest, as shown.

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