Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6341914 | Ballpoint pen tip and ballpoint pen using the same | Hiroyasu Abe | 2002-01-29 |
| D452527 | Ball-point pen | Masayuki Tsuchida | 2001-12-25 |
| 4844642 | Cap for writing equipment | Takao Inaba, Kenji Sakai, Tadao Iida | 1989-07-04 |