Patent
   D913024
Priority
Oct 25 2019
Filed
Nov 13 2019
Issued
Mar 16 2021
Expiry
Mar 16 2036
Assg.orig
Entity
unknown
1
22
n/a
The ornamental design for a chair backrest, as shown and described.

FIG. 1 is a perspective view of chair backrest showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left end view thereof;

FIG. 5 is a right end view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is another perspective view thereof; and,

FIG. 9 is a perspective view thereof, shown with environmental subject matter.

The broken lines shown in the drawings are for the purpose of illustrating environmental subject matter and form no part of the claimed design.

Su, Shu O

Patent Priority Assignee Title
D929772, Nov 25 2020 CHENGDU YISHOUWEISHENG TECHNOLOGY INC Lumbar support cushion
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Oct 31 2019SU, SHU OWELLWORKER INTERNATIONAL CO , LTD ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0510050160 pdf
Nov 13 2019WELLWORKER INTERNATIONAL CO., LTD.(assignment on the face of the patent)
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