Chair backrest
Description
Claims
The ornamental design for a chair backrest, as shown and described.
Referenced Cited
U.S. Patent Documents
D489191 | May 4, 2004 | Ma |
D514832 | February 14, 2006 | Tsai |
D534384 | January 2, 2007 | Su |
D540080 | April 10, 2007 | Su |
D540580 | April 17, 2007 | Su |
D543398 | May 29, 2007 | Su |
D579695 | November 4, 2008 | Wu |
D580198 | November 11, 2008 | Wu |
D650617 | December 20, 2011 | Chen |
D660621 | May 29, 2012 | Su |
D660622 | May 29, 2012 | Su |
D661136 | June 5, 2012 | Su |
D661137 | June 5, 2012 | Su |
Patent History
Patent number: D683574
Type: Grant
Filed: Aug 15, 2012
Date of Patent: Jun 4, 2013
Inventor: Tung-Hua Su (Tainan)
Primary Examiner: Mimosa De
Application Number: 29/429,730
Type: Grant
Filed: Aug 15, 2012
Date of Patent: Jun 4, 2013
Inventor: Tung-Hua Su (Tainan)
Primary Examiner: Mimosa De
Application Number: 29/429,730
Classifications
Current U.S. Class:
D6/716.4;
D6/366