Issued Patents All Time
Showing 76–100 of 112 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4487824 | Electrophotographic photosensitive member containing a halogen substituted hydrazone | Kazuharu Katagiri, Katsunori Watanabe, Shozo Ishikawa, Makoto Kitahara | 1984-12-11 |
| 4485159 | Laminate type electrophotographic light-sensitive material | Katsunori Watanabe, Shigeto Ohta, Shozo Ishikawa, Makoto Kitahara | 1984-11-27 |
| 4481271 | Layered electrophotographic photoconductor containing a hydrazone | Mitsuru Hashimoto, Toshio Fukagai, Tatsuya Katoh, by Mankichi Katoh, legal representative | 1984-11-06 |
| 4456671 | Electrophotographic photosensitive member having a photosensitive layer containing a hydrazone compound | Minoru Mabuchi, Naoto Fujimura, Shozo Ishikawa, Yoshio Takasu, Masaki Kuribayashi | 1984-06-26 |
| 4454212 | Electrophotographic photoconductor | Mitsuru Hashimoto, Masafumi Ohta, Masaomi Sasaki | 1984-06-12 |
| 4451545 | Electrophotographic element with carbazole derivative | Mitsuru Hashimoto | 1984-05-29 |
| 4436800 | Multilayer electrophotographic element containing a trisazo charge carrier generating substance and a hydrazone charge carrier transfer substance | Masafumi Ohta | 1984-03-13 |
| 4426327 | 3,6-Disazo-9-ethyl carbazole compounds | Mitsuru Hashimoto, Masafumi Ohta, Akio Kozima, Masaomi Sasaki | 1984-01-17 |
| 4423129 | Electrophotographic member having layer containing methylidenyl hydrazone compound | Yoshio Takasu, Minoru Mabuchi, Shozo Ishikawa, Katsunori Watanabe | 1983-12-27 |
| 4420548 | Electrophotographic member with hydrazone or ketazine compounds | Minoru Mabuchi, Toshiko Suzuki, Yuji Egarashi, Shozo Ishikawa | 1983-12-13 |
| 4413045 | Multilayer electrophotographic photosensitive member comprises disazo charge generator layer, hydrazone transport layer | Shozo Ishikawa, Kazuharu Katagiri, Katsunori Watanabe, Makoto Kitahara | 1983-11-01 |
| 4400455 | Layered organic electrophotographic photoconductor element comprising bisazo generating and hydrazone transport layers | Mitsuru Hashimoto, Katsunari Ohta, Akio Kojima | 1983-08-23 |
| 4399207 | Electrophotographic photosensitive member with hydrazone compound | Minoru Mabuchi, Shozo Ishikawa, Makoto Kitahara | 1983-08-16 |
| 4399208 | Electrophotographic photosensitive member | Yoshio Takasu, Norie Takebayashi, Minoru Mabuchi, Shozo Ishikawa | 1983-08-16 |
| 4391889 | Electrophotographic photosensitive member with benzimidazole ring containing hydrazones | Minoru Mabuchi, Shozo Ishikawa, Yuji Egashira, Makoto Kitahara | 1983-07-05 |
| 4388393 | Hydrazone compound, with hydroxyethyl group in charge transfer layer | — | 1983-06-14 |
| 4387147 | Electrophotographic element containing hydrazone compounds in charge transport layers | — | 1983-06-07 |
| 4385106 | Charge transfer layer with styryl hydrazones | — | 1983-05-24 |
| 4365014 | Electrophotographic photoconductor | Mitsuru Hashimoto, Masafumi Ohta, Masaomi Sasaki | 1982-12-21 |
| 4338388 | Electrophotographic element with a phenyhydrazone charge transport layer | Mitsuru Hashimoto, Tomiko Kawakami | 1982-07-06 |
| 4332948 | Novel hydrazone compounds and process for preparing the same | Mitsuru Hashimoto, Kyoji Tsutsui | 1982-06-01 |
| 4322435 | Prostacyclin compounds | Koichi Kojima, Shinsaku Kobayashi | 1982-03-30 |
| 4314015 | Electrophotographic sensitive materials containing disazo compounds | Mitsuru Hashimoto, Masafumi Ohta, Akio Kozima, Masaomi Sasaki, Kyoji Tsutsui | 1982-02-02 |
| 4299896 | Electrophotographic sensitive materials containing a disazo pigment | Mitsuru Hashimoto, Masafumi Ohta, Akio Kozima, Masaomi Sasaki, Kyoji Tsutsui | 1981-11-10 |
| 4297426 | Electrophotographic element with carbazole hydrazone or anile charge transport compounds | Mitsuru Hashimoto, Tomiko Kawakami | 1981-10-27 |