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The ornamental design for a robot vacuum cleaner, as shown and described.
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1. Robot vacuum cleaner
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jun 28 2020 | MIDEA GROUP CO., LTD. | (assignment on the face of the patent) | / | |||
| Oct 29 2020 | LYU, ZHAOHUA | MIDEA GROUP CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 054441 | /0694 |
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