Chair backrest
Description
The broken lines shown in the drawings are for the purpose of illustrating environmental subject matter and form no part of the claimed design.
Claims
The ornamental design for a chair backrest, as shown and described.
Referenced Cited
U.S. Patent Documents
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Patent History
Patent number: D913024
Type: Grant
Filed: Nov 13, 2019
Date of Patent: Mar 16, 2021
Assignee: WELLWORKER INTERNATIONAL CO., LTD. (Tainan)
Inventor: Shu O Su (Tainan)
Primary Examiner: Kevin K Rudzinski
Assistant Examiner: Paul D Bohannon
Application Number: 29/713,127
Type: Grant
Filed: Nov 13, 2019
Date of Patent: Mar 16, 2021
Assignee: WELLWORKER INTERNATIONAL CO., LTD. (Tainan)
Inventor: Shu O Su (Tainan)
Primary Examiner: Kevin K Rudzinski
Assistant Examiner: Paul D Bohannon
Application Number: 29/713,127
Classifications
Current U.S. Class:
D6/716.4