Issued Patents All Time
Showing 76–79 of 79 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4753158 | Pilot hydraulic system for operating directional control valve | Toichi Hirata, Genroku Sugiyama | 1988-06-28 |
| 4687862 | Fluoran compounds | Takeo Obitsu, Tetsuo Igaki, Kimiaki Kinoshita, Morio Nanbu | 1987-08-18 |
| 4680598 | Chromogenic materials employing fluoran compounds | Takeo Obitsu, Tetsuo Igaki, Kimiaki Kinoshita, Morio Nanbu | 1987-07-14 |
| 4478376 | Method of winding magnetic recording tape | Masaaki Sakaguchi, Seiji Kiuchi, Hiroshi Chikamasa | 1984-10-23 |