Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6687959 | Clip attaching structure | Hidehei Kageyama, Yoshio Noguchi, Sachio Arai | 2004-02-10 |
| 5700101 | Writing tool | Shuhei Kageyama, Youichi Nakazato, Yoshihide Mitsuya | 1997-12-23 |
| 5683191 | Writing tool | Shuhei Kageyama, Youichi Nakazato, Yoshihide Mitsuya | 1997-11-04 |
| 5370471 | Writing tool, with eraser dispenser | Shubei Kageyama, Youichi Nakazato, Yoshihide Mitsuya | 1994-12-06 |
| 5236270 | Writing tool for advancing lead with eraser dispenser | Shuhei Kageyama, Youichi Nakazato, Yoshihide Mitsuya | 1993-08-17 |
| 5207522 | Knock type mechanical pencil with retractable eraser | Shuhei Kageyama, Youichi Nakazato, Yoshihide Mitsuya | 1993-05-04 |
| 5062727 | Writing tool | Shubei Kageyama, Youichi Nakazato, Yoshihide Mitsuya | 1991-11-05 |
| 5022774 | Writing tool with eraser dispenser | Shuhei Kageyama, Youichi Nakazato, Yoshihide Mitsuya | 1991-06-11 |
| 4583874 | Knock-type propelling pencil with storage cartridge | — | 1986-04-22 |
| 4200977 | Cutter knife | Hidehei Kageyama | 1980-05-06 |