Frame of chair backrest
Description
Claims
The ornamental design for a frame of chair backrest, as shown and described.
Referenced Cited
Patent History
Patent number: D667244
Type: Grant
Filed: May 20, 2011
Date of Patent: Sep 18, 2012
Inventor: Shu O Su (Tainan)
Primary Examiner: Mimosa De
Attorney: David and Raymond Patent Firm
Application Number: 29/392,369
Type: Grant
Filed: May 20, 2011
Date of Patent: Sep 18, 2012
Inventor: Shu O Su (Tainan)
Primary Examiner: Mimosa De
Attorney: David and Raymond Patent Firm
Application Number: 29/392,369
Classifications
Current U.S. Class:
D6/502