Chair backrest
Description
Claims
The ornamental design for a chair backrest, as shown and described.
Referenced Cited
U.S. Patent Documents
D540079 | April 10, 2007 | Bock |
D540080 | April 10, 2007 | Su |
D540578 | April 17, 2007 | Chen |
D541063 | April 24, 2007 | Su |
D547978 | August 7, 2007 | Machael et al. |
D548992 | August 21, 2007 | Koepke et al. |
D553886 | October 30, 2007 | Su |
D557028 | December 11, 2007 | Su |
D557915 | December 25, 2007 | Ong |
D558994 | January 8, 2008 | Machael et al. |
D570624 | June 10, 2008 | Kang |
D573817 | July 29, 2008 | Su |
Patent History
Patent number: D580199
Type: Grant
Filed: Jul 2, 2008
Date of Patent: Nov 11, 2008
Inventor: Shu O Su (Tainan City)
Primary Examiner: Mimosa De
Attorney: Pro-Techtor Int'l Services
Application Number: 29/308,751
Type: Grant
Filed: Jul 2, 2008
Date of Patent: Nov 11, 2008
Inventor: Shu O Su (Tainan City)
Primary Examiner: Mimosa De
Attorney: Pro-Techtor Int'l Services
Application Number: 29/308,751
Classifications
Current U.S. Class:
D6/502;
D6/366