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The ornamental design for a 3d printer, as shown and described.
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The broken lines show portions of a 3D printer and form no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Sep 01 2017 | CHEN, LIANG | HANGZHOU WEIBIN TECHNOLOGY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 048461 | /0044 |
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