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The ornamental design for a writing instrument, as shown and described.
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| Patent | Priority | Assignee | Title |
| D777257, | Aug 07 2015 | Hub Pen Company, LLC | Pen |
| D792519, | Jan 27 2015 | Societe Bic | Writing instrument |
| D797192, | Jan 22 2016 | AMSTERDAM PRINTING & LITHO, INC. | Writing instrument |
| D799597, | Aug 07 2015 | Hub Pen Company, LLC | Pen |
| D863430, | May 04 2018 | YEU CHYUAN INDUSTRIAL CO., LTD. | Woodburning pen housing |
| D923093, | Dec 27 2019 | AMSTERDAM PRINTING & LITHO, INC. | Writing instrument |
| D939222, | Jul 24 2020 | Wahl Clipper Corporation | Tool handle |
| 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 | 035519 | /0210 |
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