Chair backrest
Description
Claims
The ornamental design for a chair backrest, as shown and described.
Referenced Cited
U.S. Patent Documents
D493627 | August 3, 2004 | Ma |
D514832 | February 14, 2006 | Tsai |
D540080 | April 10, 2007 | Su |
D540081 | April 10, 2007 | Su |
D540579 | April 17, 2007 | Su |
D540580 | April 17, 2007 | Su |
D543398 | May 29, 2007 | Su |
D579695 | November 4, 2008 | Wu |
D580198 | November 11, 2008 | Wu |
D580199 | November 11, 2008 | Su |
D582170 | December 9, 2008 | Chi |
D596430 | July 21, 2009 | Su |
D604071 | November 17, 2009 | Su |
Patent History
Patent number: D661136
Type: Grant
Filed: Jul 8, 2010
Date of Patent: Jun 5, 2012
Inventor: Tung-Hua Su (Tainan Hsien)
Primary Examiner: Mimosa De
Application Number: 29/365,389
Type: Grant
Filed: Jul 8, 2010
Date of Patent: Jun 5, 2012
Inventor: Tung-Hua Su (Tainan Hsien)
Primary Examiner: Mimosa De
Application Number: 29/365,389
Classifications
Current U.S. Class:
D6/502;
D6/366