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The ornamental design for an air purifier, as shown and described.
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The broken lines depict portions of the air purifier that form no part of the claimed design.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Mar 19 2020 | YANG, LIN | ETEKCITY CORPORATION | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 052182 | /0318 | |
Mar 19 2020 | YANG, HAI | ETEKCITY CORPORATION | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 052182 | /0318 |
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