Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D462716 | Ball-point pen | Tomoko Tsuchida | 2002-09-10 |
| D426573 | Ball-point pen | Nobuo Sekine, Kazuo Iwase | 2000-06-13 |
| D426263 | Ball-point pen | Nobuo Sekine, Kazuo Iwase | 2000-06-06 |
| D408451 | Pen point of a ball-point pen | — | 1999-04-20 |
| 5700534 | Coloring fluid-containing marking device made of biodegradable plastic resin | Masaki Shibazaki, Tohru Watanabe | 1997-12-23 |