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The ornamental design for a writing instrument, as shown and described.
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| Patent | Priority | Assignee | Title |
| D780268, | Aug 10 2015 | DAVRO PRODUCTS, INC. | Pen |
| D782576, | Aug 10 2015 | DAVRO PRODUCTS, INC. | Pen |
| D816166, | Nov 22 2016 | KOTOBUKI & CO , LTD | Ballpoint pen |
| D816769, | Oct 01 2015 | Maped | Writing implement |
| D817403, | Jun 28 2016 | AMSTERDAM PRINTING & LITHO, INC. | Writing instrument |
| D826331, | Dec 21 2015 | Writing instrument | |
| D956869, | Nov 28 2018 | Pentel Kabushiki Kaisha | Ballpoint pen |
| D956870, | Apr 10 2020 | Pentel Kabushiki Kaisha | Ballpoint pen |
| ER8385, | |||
| ER9011, |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Mar 27 2015 | Riteline LLC | (assignment on the face of the patent) | / | |||
| Apr 28 2015 | ZHANG, ENMIN | Riteline LLC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 035518 | /0759 |
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