Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11813886 | Slide-type writing instrument having drying-prevention device | — | 2023-11-14 |
| 10434815 | Slide-type writing instrument having drying-prevention device | — | 2019-10-08 |
| 10052906 | Multicolor writing instrument with automatic return function | — | 2018-08-21 |
| 9340060 | Slide type writing tool having device for preventing dryness | — | 2016-05-17 |