Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6517271 | Double-chuck mechanical pencil | Hidehei Kageyama, Yoshihide Mitsuya | 2003-02-11 |
| 6517272 | Double-chuck mechanical pencil | Hidehei Kageyama, Yoshihide Mitsuya | 2003-02-11 |
| 5988913 | Double-chuck mechanical pencil | Hidehei Kageyama, Yoshihide Mitsuya | 1999-11-23 |
| 5947620 | Double-chuck mechanical pencil | Hidehei Kageyama, Tadashi Yamamoto, Yoshihide Mitsuya | 1999-09-07 |
| 5890827 | Bar extruding implement with ejector | Hidehei Kageyama, Yoshihide Mitsuya | 1999-04-06 |
| 5713680 | Combined writing tool | Tokiyoshi Yoshino, Yoshihide Mitsuya | 1998-02-03 |
| 5462376 | Mechanical pencil with improved slider mechanism | Hidehei Kageyama, Yoshihide Mitsuya | 1995-10-31 |