Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5225301 | Electrophotographic yellow toner and process for producing the same | Heihachi Yushina, Yukihiro Sato, Hirofumi Oda | 1993-07-06 |
| 4960668 | Magnetic toner for electrophotography | Toshihiko Yoshitomi, Heihachi Yushina, Hiromi Horiuchi, Yukio Yamaguchi, Kiyoshi Sekihara | 1990-10-02 |
| 4764448 | Amorphous silicon hydride photoreceptors for electrophotography, process for the preparation thereof, and method of use | Toshihiko Yoshitomi, Hiromi Horiuchi, Yukio Yamaguchi, Kiyoshi Sekihara | 1988-08-16 |