Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6076987 | Ballpoint pen and cap therefor | Nobuo Sekine, Masashi Andoh, Yoshiaki Okawara | 2000-06-20 |
| 6010269 | Writing implement | Takao Inaba, Hideyuki Tanaka | 2000-01-04 |
| 5290117 | Penpoint assembly and writing instrument employing the same | Osami Yamauchi | 1994-03-01 |
| 4968169 | Penpoint assembly and writing instrument employing the same | Osami Yamauchi | 1990-11-06 |
| 4913175 | Liquid-applying tip assembly | Osami Yamauchi, Hiroshi Kato | 1990-04-03 |
| 4457644 | Ball-point pen tip | — | 1984-07-03 |