Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5087144 | Temporary ink storage member and writing instrument using the same | Yoshihiro Wada, Kazunori Suzuki, Tadashi Kono | 1992-02-11 |
| 4902151 | Writing instrument with plural elements | Shigeo Oka | 1990-02-20 |