Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H708 | Method of producing diacetone sorbose | Youichi Oka, Hitoshi Sawada | 1989-11-07 |
| 4866479 | Photosensitive drums | Ichizo Tsukuda, Takashi Atsumi | 1989-09-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H708 | Method of producing diacetone sorbose | Youichi Oka, Hitoshi Sawada | 1989-11-07 |
| 4866479 | Photosensitive drums | Ichizo Tsukuda, Takashi Atsumi | 1989-09-12 |