Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9617436 | Water-based ink composition and marking pen | Mayuko Tsujimoto, Motoko Ishida | 2017-04-11 |
| 8784546 | W/O-type emulsion ink composition for writing utensil and writing utensil | Eriko Nemoto, Makoto Fuse, Taku Fukai | 2014-07-22 |