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The ornamental design for an air purifier, as shown and described.
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1. Air purifier
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| ER1750, | |||
| ER2255, | |||
| ER462, | |||
| ER7657, |
| Patent | Priority | Assignee | Title |
| 20180256770, | |||
| 20200300502, | |||
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 06 2020 | MIDEA GROUP CO., LTD. | (assignment on the face of the patent) | / | |||
| Apr 15 2021 | HONG, SIZHAN | MIDEA GROUP CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 056053 | /0243 |
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