Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11148460 | Writing instrument | Hitoshi Suzuki, Kouichi Hirano, Toshimi Kamitani | 2021-10-19 |
| 8944716 | Valved applicator | Tooru Nakajima | 2015-02-03 |
| 7837404 | Applicator | Atsushi Iwasa, Akira Fukai, Takahiro Osada | 2010-11-23 |
| 7101102 | Capless writing instrument | — | 2006-09-05 |
| 6761496 | Writing utensil | Takahiro Osada, Kazuhiro Ami | 2004-07-13 |
| 6478495 | Capless writing instrument | Kazuhiro Ami, Takahiro Osada | 2002-11-12 |