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The ornamental design for a piano mat, as shown and described.
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The broken lines in the figures illustrate portions of the piano mat that form no part of the claimed design.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Oct 12 2019 | YANG, CHUNYI | SHENZHEN SANMEISEN TECHNOLOGY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 050694 | /0191 |
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