Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889924 | Bisazo compounds | Yutaka Akasaki, Akihiko Tokita, Kaoru Torikoshi, Touru Ishii | 1989-12-26 |
| 4822704 | Electrophotographic photoreceptor having a bisazo compound | Yutaka Akasaki, Akihiko Tokita, Kaoru Torikoshi, Touru Ishii | 1989-04-18 |
| 4820600 | Electrophotographic photoreceptor having a bisazo compound | Yutaka Akasaki, Akihiko Tokita, Kaoru Torikoshi, Touru Ishii | 1989-04-11 |