Issued Patents All Time
Showing 51–75 of 93 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886846 | Aromatic diolefinic compounds, aromatic diethyl compounds and electrophotographic photoconductors comprising one aromatic diethyl compound | Tomoyuki Shimada, Masaomi Sasaki | 1989-12-12 |
| 4830942 | Electrophotographic photoconductor | Toshio Fukagai, Michio Kimura, Masafumi Ohta | 1989-05-16 |
| 4784905 | Thermosensitive image transfer recording medium | Akira Suzuki, Nobuo Mochizuki, Motoo Tasaka | 1988-11-15 |
| 4708921 | Photosensitive material containing disazo compound for use in electrophotography | — | 1987-11-24 |
| 4666805 | Photosensitive material containing disazo compound for use in electrophotography | — | 1987-05-19 |
| 4656257 | Disazo compound having an anthraquinone nucleus | — | 1987-04-07 |
| 4619878 | Tetrazonium salt compound, disazo compound, method for preparing the same, and photosensitive material containing said disazo compound for use in electrophotography | — | 1986-10-28 |
| 4618672 | Bisazo compounds useful as charge generating pigments in electrophotography | — | 1986-10-21 |
| 4614682 | Thermosensitive image transfer recording medium | Akira Suzuki, Hideo Watanabe, Nobuo Mochizuki, Keishi Kubo, Susumu Tatsumi +1 more | 1986-09-30 |
| 4596754 | Electrophotographic printing original plate and electrophotographic plate making process using the printing original plate | Kyoji Tsutsui, Masafumi Ohta, Masaomi Sasaki | 1986-06-24 |
| 4555567 | 2,6-Disazo anthraquinone compounds | — | 1985-11-26 |
| 4554233 | Electrophotographic toner containing triazolium compound as charge controlling agent | Toshiyasu Kawabata, Toshiki Nanya, Hisao Murayama | 1985-11-19 |
| 4537844 | Electrophotographic element containing disazo compound | — | 1985-08-27 |
| 4486522 | Tetrazonium salt, novel disazo compound, method of preparing same and electrophotographic element using same | — | 1984-12-04 |
| 4481271 | Layered electrophotographic photoconductor containing a hydrazone | Kiyoshi Sakai, Toshio Fukagai, Tatsuya Katoh, by Mankichi Katoh, legal representative | 1984-11-06 |
| 4454212 | Electrophotographic photoconductor | Kiyoshi Sakai, Masafumi Ohta, Masaomi Sasaki | 1984-06-12 |
| 4451545 | Electrophotographic element with carbazole derivative | Kiyoshi Sakai | 1984-05-29 |
| 4440845 | Disazo compound, method of making same and electrophotographic element using same | — | 1984-04-03 |
| 4426327 | 3,6-Disazo-9-ethyl carbazole compounds | Masafumi Ohta, Akio Kozima, Kiyoshi Sakai, Masaomi Sasaki | 1984-01-17 |
| 4400455 | Layered organic electrophotographic photoconductor element comprising bisazo generating and hydrazone transport layers | Kiyoshi Sakai, Katsunari Ohta, Akio Kojima | 1983-08-23 |
| 4390608 | Layered charge generator/transport electrophotographic photoconductor uses bisazo pigment | Masaomi Sasaki, Toshio Fukagai, Tatsuya Katoh, by Mankichi Katoh, legal representative | 1983-06-28 |
| 4365014 | Electrophotographic photoconductor | Kiyoshi Sakai, Masafumi Ohta, Masaomi Sasaki | 1982-12-21 |
| 4343882 | Electrophotographic bisazo photoconductor | — | 1982-08-10 |
| 4338388 | Electrophotographic element with a phenyhydrazone charge transport layer | Kiyoshi Sakai, Tomiko Kawakami | 1982-07-06 |
| 4332948 | Novel hydrazone compounds and process for preparing the same | Kiyoshi Sakai, Kyoji Tsutsui | 1982-06-01 |