Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884259 | Optical memory disk and track access therefor | Hiroshi Horikawa, Daigo Ezuka, Takashi Shoji | 1989-11-28 |
| 4860050 | Developing replenisher material for use in image forming device | Tsuneo Kurotori, Manabu Mochizuki, Kenzo Ariyama, Shinichi Kuramoto, Yoshihiro Sugiyama +3 more | 1989-08-22 |