Chair backrest
Description
Claims
The ornamental design for a chair backrest, as shown and described.
Referenced Cited
U.S. Patent Documents
D471042 | March 4, 2003 | Schmitz |
D539578 | April 3, 2007 | Chen |
D557025 | December 11, 2007 | Chen |
D580199 | November 11, 2008 | Su |
D600477 | September 22, 2009 | Su |
D646092 | October 4, 2011 | Romero |
D660621 | May 29, 2012 | Su |
D660622 | May 29, 2012 | Su |
D683172 | May 28, 2013 | Su |
D683574 | June 4, 2013 | Su |
D697732 | January 21, 2014 | Wan |
D703457 | April 29, 2014 | Plikat |
D766605 | September 20, 2016 | Li |
Patent History
Patent number: D773874
Type: Grant
Filed: Apr 8, 2015
Date of Patent: Dec 13, 2016
Inventor: Tung-Hua Su (Tainan)
Primary Examiner: Ricky Pham
Application Number: 29/523,236
Type: Grant
Filed: Apr 8, 2015
Date of Patent: Dec 13, 2016
Inventor: Tung-Hua Su (Tainan)
Primary Examiner: Ricky Pham
Application Number: 29/523,236
Classifications
Current U.S. Class:
D6/716.4;
D6/366