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The ornamental design for a writing instrument, as shown and described.
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| Patent | Priority | Assignee | Title |
| D860317, | Dec 04 2017 | DAVRO PRODUCTS, INC. | Pen |
| D923708, | Mar 01 2019 | BEIFA GROUP CO , LTD | Pen |
| 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 | /0030 |
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