Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6786958 | Ink for oil-based ball pen | Masaaki Morita, Susumu Suzuki, Kyoko Kobayashi | 2004-09-07 |
| 6398441 | Ink for ball-point pen and ball-point pen using the same | — | 2002-06-04 |
| 5690442 | Metal tip for ball-point pen | Shinsuke Sato, Toru Kitao, Masao Hashi | 1997-11-25 |
| 5691863 | Power feeding device for VTR rotating drum | — | 1997-11-25 |