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The ornamental design for an office chair, as shown and described.
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The broken lines in the figures illustrate portions of the office chair that form no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Mar 08 2021 | ZHONG, LIANGXING | SHENZHEN SHIZICHUANQI TECHNOLOGY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 055526 | /0120 |
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