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			 The ornamental design for the skin massage roller, as shown and described. 
			  
			  
			  
			  
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The broken lines shown on the drawings depict portions of the skin massage roller that form no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Sep 13 2017 | MATSUSHITA, TSUYOSHI | MTG CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 043654 | /0272 | |
| Sep 21 2017 | MTG CO., LTD. | (assignment on the face of the patent) | / | 
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