Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889924 | Bisazo compounds | Akihiko Tokita, Kaoru Torikoshi, Akira Imai, Touru Ishii | 1989-12-26 |
| 4846893 | Process for producing a surface treated pigment | Naoya Yabuuchi, Tatsuro Ohki | 1989-07-11 |
| 4833054 | Electrophotographic photoreceptor having a bisazo compound | Katsuhiro Sato, Akihiko Tokita;, Hidemi Suto | 1989-05-23 |
| 4833263 | Novel electron-accepting compound and method for preparing the same | Katsuhiro Sato, Hiroyuki Tanaka, Katsumi Nukada, Hidemi Sudo | 1989-05-23 |
| 4822704 | Electrophotographic photoreceptor having a bisazo compound | Akihiko Tokita, Kaoru Torikoshi, Akira Imai, Touru Ishii | 1989-04-18 |
| 4820600 | Electrophotographic photoreceptor having a bisazo compound | Akihiko Tokita, Kaoru Torikoshi, Akira Imai, Touru Ishii | 1989-04-11 |