Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700101 | Writing tool | Shuhei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya | 1997-12-23 |
| 5683191 | Writing tool | Shuhei Kageyama, Toshihiko Kageyama, Yoshihide Mitsuya | 1997-11-04 |