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The ornamental design for an air purifier, as shown and described.
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The broken lines in the drawings illustrate the portions of the air purifier which form no part of the claimed design.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Nov 18 2020 | YAN, YIQING | SHENZHEN PUREMATE TECHNOLOGY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 054417 | /0750 | |
Nov 19 2020 | SHENZHEN PUREMATE TECHNOLOGY CO., LTD. | (assignment on the face of the patent) | / |
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