Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4426327 | 3,6-Disazo-9-ethyl carbazole compounds | Mitsuru Hashimoto, Masafumi Ohta, Kiyoshi Sakai, Masaomi Sasaki | 1984-01-17 |
| 4348470 | Electrophotographic element containing disazo compounds | Eiichi Akutsu, Kiyomi Ichizuka | 1982-09-07 |
| 4314015 | Electrophotographic sensitive materials containing disazo compounds | Mitsuru Hashimoto, Kiyoshi Sakai, Masafumi Ohta, Masaomi Sasaki, Kyoji Tsutsui | 1982-02-02 |
| 4301224 | Electrophotographic element with a combination of binder resins | Eiichi Akutsu | 1981-11-17 |
| 4299896 | Electrophotographic sensitive materials containing a disazo pigment | Mitsuru Hashimoto, Kiyoshi Sakai, Masafumi Ohta, Masaomi Sasaki, Kyoji Tsutsui | 1981-11-10 |
| 4293628 | Electrophotographic elements containing disazo compounds | Mitsuru Hashimoto, Masafumi Ohta, Kiyoshi Sakai, Masaomi Sasaki | 1981-10-06 |
| 4279981 | Electrophotographic elements containing trisazo compounds | Masafumi Ohta, Kiyoshi Sakai, Mitsuru Hashimoto, Masaomi Sasaki | 1981-07-21 |
| 4272598 | Electrophotographic material containing disazo compounds | Masaomi Sasaki, Kiyoshi Sakai, Mitsuru Hashimoto, Masafumi Ohta | 1981-06-09 |
| 4264695 | Electrophotographic photosensitive material with electron donors and electron acceptors | Mitsuru Hashimoto, Masafumi Ohta, Masaomi Sasaki, Zenjiro Okuno | 1981-04-28 |
| 4256821 | Electrophotographic element with carbazole-phenyhydrazone charge transport layer | Takamichi Enomoto, Tatuya Katoh, Tatsumi Satoh | 1981-03-17 |
| 4242260 | 2-Hydroxy-3-carbonylanilinonaphth-1-yl disazo derivatives and 1-phenyl-3-methyl-5-hydroxypyrazol-4-yl disazo derivatives of 1,4-bis(4-aminostyryl) benzene | Masaomi Sasaki, Kiyoshi Sakai, Mitsuru Hashimoto, Masafumi Ohta | 1980-12-30 |