Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5690442 | Metal tip for ball-point pen | Shinsuke Sato, Toshiaki Takayanagi, Masao Hashi | 1997-11-25 |
| 5678942 | Ball-point pen | Seiichi Kobayashi, Kazuaki Matsumoto | 1997-10-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5690442 | Metal tip for ball-point pen | Shinsuke Sato, Toshiaki Takayanagi, Masao Hashi | 1997-11-25 |
| 5678942 | Ball-point pen | Seiichi Kobayashi, Kazuaki Matsumoto | 1997-10-21 |