Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5074694 | Latch mechanism for retractable writing instruments | Youichi Nakazato, Shubei Kageyama, Yoshihide Mitsuya | 1991-12-24 |
| 5056947 | Dual refill-type writing utensil | Hidehei Kageyama, Saburo Kobayashi, Yoshihide Mitsuya, Tadayoshi Ebinuma | 1991-10-15 |
| 4973179 | Clip actuated latch mechanism for retractable writing instruments | Youichi Nakazato, Shuhei Kageyama, Yoshihide Mitsuya | 1990-11-27 |