Issued Patents All Time
Showing 26–50 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5153073 | Electroluminescent device | Teruyuki Ohnuma, Tomoyuki Shimada, Fumio Kawamura, Yohta Sakon, Toshihiko Takahashi | 1992-10-06 |
| 5118986 | Electroluminescent device | Teruyuki Ohnuma, Fumio Kawamura, Yohta Sakon, Toshihiko Takahashi, Mitsuru Hashimoto | 1992-06-02 |
| 5093210 | Electroluminescent device | Teruyuki Ohnuma, Fumio Kawamura, Yohta Sakon, Toshihiko Takahashi | 1992-03-03 |
| 4992109 | Photoelectric conversion element | Masao Yoshikawa, Tetsuro Suzuki, Akio Kojima, Masayuki Shoshi | 1991-02-12 |
| 4830942 | Electrophotographic photoconductor | Toshio Fukagai, Michio Kimura, Mitsuru Hashimoto | 1989-05-16 |
| 4663442 | Disazo triphenylamine compounds | — | 1987-05-05 |
| 4596754 | Electrophotographic printing original plate and electrophotographic plate making process using the printing original plate | Kyoji Tsutsui, Mitsuru Hashimoto, Masaomi Sasaki | 1986-06-24 |
| 4582771 | Disazo compound, method for preparing the same, and electrophotographic element containing the same for use in electrophotography | — | 1986-04-15 |
| 4567124 | Electrophotographic element with trisazo photoconductor and an amine substituted charge transfer material | Masaomi Sasaki, Masayuki Shoshi | 1986-01-28 |
| 4529678 | Electrophotographic photoconductor comprising a dithiol derivative | — | 1985-07-16 |
| 4507471 | "Trisazo compounds prepared from 4,4',4""-triaminotriphenylamine and 2-hydroxy-3-phenylcarbamoylbenzo[a]carbazole derivatives" | — | 1985-03-26 |
| 4454212 | Electrophotographic photoconductor | Kiyoshi Sakai, Mitsuru Hashimoto, Masaomi Sasaki | 1984-06-12 |
| 4439506 | Multilayer electrophotographic element containing a trisazo charge carrier generating substance and an anthracene or divinyl benzene charge carrier transfer substance | Masaomi Sasaki | 1984-03-27 |
| 4436800 | Multilayer electrophotographic element containing a trisazo charge carrier generating substance and a hydrazone charge carrier transfer substance | Kiyoshi Sakai | 1984-03-13 |
| 4426327 | 3,6-Disazo-9-ethyl carbazole compounds | Mitsuru Hashimoto, Akio Kozima, Kiyoshi Sakai, Masaomi Sasaki | 1984-01-17 |
| 4365014 | Electrophotographic photoconductor | Kiyoshi Sakai, Mitsuru Hashimoto, Masaomi Sasaki | 1982-12-21 |
| 4327020 | Bis-azo compounds | Masaomi Sasaki, Kyoji Tsutsui | 1982-04-27 |
| 4314016 | Electrophotographic element having a bisazo photoconductor | Mitsuru Hashimoto, Kyoji Tsutsui | 1982-02-02 |
| 4314015 | Electrophotographic sensitive materials containing disazo compounds | Mitsuru Hashimoto, Kiyoshi Sakai, Akio Kozima, Masaomi Sasaki, Kyoji Tsutsui | 1982-02-02 |
| 4299896 | Electrophotographic sensitive materials containing a disazo pigment | Mitsuru Hashimoto, Kiyoshi Sakai, Akio Kozima, Masaomi Sasaki, Kyoji Tsutsui | 1981-11-10 |
| 4293628 | Electrophotographic elements containing disazo compounds | Mitsuru Hashimoto, Akio Kozima, Kiyoshi Sakai, Masaomi Sasaki | 1981-10-06 |
| 4293492 | Disazo compounds derived from 3,6-bis(styryl)-9-ethylcarbazole | Masaomi Sasaki, Kiyoshi Sakai, Mitsuru Hashimoto, Kyoji Tsutsui | 1981-10-06 |
| 4279981 | Electrophotographic elements containing trisazo compounds | Kiyoshi Sakai, Mitsuru Hashimoto, Akio Kozima, Masaomi Sasaki | 1981-07-21 |
| 4272598 | Electrophotographic material containing disazo compounds | Masaomi Sasaki, Kiyoshi Sakai, Mitsuru Hashimoto, Akio Kozima | 1981-06-09 |
| 4264695 | Electrophotographic photosensitive material with electron donors and electron acceptors | Akio Kozima, Mitsuru Hashimoto, Masaomi Sasaki, Zenjiro Okuno | 1981-04-28 |