Issued Patents All Time
Showing 151–163 of 163 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4293628 | Electrophotographic elements containing disazo compounds | Mitsuru Hashimoto, Masafumi Ohta, Akio Kozima, Kiyoshi Sakai | 1981-10-06 |
| 4293492 | Disazo compounds derived from 3,6-bis(styryl)-9-ethylcarbazole | Kiyoshi Sakai, Mitsuru Hashimoto, Masafumi Ohta, Kyoji Tsutsui | 1981-10-06 |
| 4279981 | Electrophotographic elements containing trisazo compounds | Masafumi Ohta, Kiyoshi Sakai, Mitsuru Hashimoto, Akio Kozima | 1981-07-21 |
| 4272598 | Electrophotographic material containing disazo compounds | Kiyoshi Sakai, Mitsuru Hashimoto, Masafumi Ohta, Akio Kozima | 1981-06-09 |
| 4268596 | Electrophotographic element having 1,4-bis(azostyryl)-2,5 dimethoxy benzene compounds as photoconductors | Mitsuru Hashimoto, Tomiko Kawakami | 1981-05-19 |
| 4264695 | Electrophotographic photosensitive material with electron donors and electron acceptors | Akio Kozima, Mitsuru Hashimoto, Masafumi Ohta, Zenjiro Okuno | 1981-04-28 |
| 4260672 | Electrophotographic sensitive element having a photoconductive disazo pigment | Kiyoshi Sakai, Mitsuru Hashimoto, Masafumi Ohta, Kyoji Tsutsui | 1981-04-07 |
| 4251613 | Disazo compounds, process for preparation of same and application of said disazo compounds and analogues thereof to electrophotographic sensitive materials | Kiyoshi Sakai, Mitsuru Hashimoto, Masafumi Ohta, Kyoji Tsutsui | 1981-02-17 |
| 4251614 | Novel disazo compounds, process for the preparation of same and application of said disazo compounds and analogues thereof to electrophotographic sensitive materials | Kiyoshi Sakai, Mitsuru Hashimoto, Masafumi Ohta, Kyoji Tsutsui | 1981-02-17 |
| 4247614 | Electrophotographic element containing a disazo pigment | Masafumi Ohta, Kiyoshi Sakai, Mitsuru Hashimoto, Tomiko Kawakami | 1981-01-27 |
| 4245021 | Electrophotographic element having charge transport layer | Takeo Kazami, Kiyoshi Sakai, Mitsuru Hashimoto, Kyoji Tsutsui, Masafumi Ohta | 1981-01-13 |
| 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 | Kiyoshi Sakai, Mitsuru Hashimoto, Masafumi Ohta, Akio Kozima | 1980-12-30 |
| 4192677 | 1,3,4-Oxadiazole derivatives and use thereof | Mitsuo Okazaki, Akihiro Yamaguchi | 1980-03-11 |