Issued Patents All Time
Showing 25 most recent of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7947598 | Substrate for semiconductor device, resin-sealed semiconductor device, method for manufacturing said substrate for semiconductor device and method for manufacturing said resin-sealed semiconductor device | Chikao Ikenaga | 2011-05-24 |
| 7825514 | Substrate for semiconductor device, resin-sealed semiconductor device, method for manufacturing said substrate for semiconductor device and method for manufacturing said resin-sealed semiconductor device | Chikao Ikenaga | 2010-11-02 |
| 4931371 | Electrophotographic photosensitive member | Masakazu Matsumoto, Wataru Ando, Toshihiro Kikuchi, Itaru Yamazaki | 1990-06-05 |
| 4830944 | Function separated photosensitive member having a diphenylamine derivative disazo charge generation material | Shoji Umehara, Masakazu Matsumoto, Takao Takiguchi | 1989-05-16 |
| 4788119 | Electrophotographic photosensitive member containing a disazo pigment | Masataka Yamashita, Hajime Miyazaki, Takao Takiguchi, Masakazu Matsumoto, Masaaki Hiro | 1988-11-29 |
| 4760003 | Electrophotographic photosensitive member containing disazo compound | Masakazu Matsumoto, Takao Takiguchi, Masataka Yamashita, Shoji Umehara, Hajime Miyazaki | 1988-07-26 |
| 4743523 | Photosensitive member for electrophotography | Masataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto | 1988-05-10 |
| 4735882 | Trisazo photsensitive member for electrophotography | Masataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto | 1988-04-05 |
| 4702982 | Electrophotographic photosensitive member comprising disazo pigment | Masakazu Matsumoto, Takao Takiguchi, Masataka Yamashita, Shoji Umehara | 1987-10-27 |
| 4666810 | Photosensitive member for electrophotography comprising azo pigments | Shoji Umehara, Masakazu Matsumoto, Takao Takiguchi, Masataka Yamashita | 1987-05-19 |
| 4610943 | Electrophotographic photosensitive member contains disazo photoconductive compound | Takao Takiguchi, Hajime Miyazaki, Masakazu Matsumoto | 1986-09-09 |
| 4554231 | Electrophotographic photosensitive member | Kiyoshi Sakai, Minoru Mabuchi, Katsunori Watanabe, Makoto Kitahara | 1985-11-19 |
| 4551404 | Disazo electrophotographic photosensitive member | Masaaki Hiro, Yoshio Takasu, Kazuharu Katagiri, Hideyuki Takahashi | 1985-11-05 |
| 4535043 | Electrophotographic photosensitive member | Hitoshi Toma, Fumio Sumino | 1985-08-13 |
| 4501808 | Recording medium and process employing a photosensitive organic film | Kiyoshi Sakai, Tetsuo Arita, Minoru Mabuchi, Shoji Umehara | 1985-02-26 |
| 4500619 | Electrophotographic photosensitive member with oxadiazole containing disazo compound | Kazuharu Katagiri, Katsunori Watanabe, Kiyoshi Sakai, Makoto Kitahara | 1985-02-19 |
| 4495264 | Electrophotographic photosensitive member comprising disazo compound | Hideyuki Takahashi | 1985-01-22 |
| 4487824 | Electrophotographic photosensitive member containing a halogen substituted hydrazone | Kazuharu Katagiri, Katsunori Watanabe, Kiyoshi Sakai, Makoto Kitahara | 1984-12-11 |
| 4485159 | Laminate type electrophotographic light-sensitive material | Katsunori Watanabe, Shigeto Ohta, Kiyoshi Sakai, Makoto Kitahara | 1984-11-27 |
| 4471040 | Electrophotographic disazo photosensitive member | Kazuharu Katagiri, Katsunori Watanabe, Makoto Kitahara | 1984-09-11 |
| 4456671 | Electrophotographic photosensitive member having a photosensitive layer containing a hydrazone compound | Minoru Mabuchi, Naoto Fujimura, Yoshio Takasu, Kiyoshi Sakai, Masaki Kuribayashi | 1984-06-26 |
| 4454211 | Electrophotographic photosensitive member with pyrazoline charge transport material | Yoshio Takasu | 1984-06-12 |
| 4446217 | Electrophotographic photosensitive member having a hydrazone containing layer | Yoshio Takasu | 1984-05-01 |
| 4427753 | Electrophotographic photosensitive member with disazo or trisazo compound | Naoto Fujimura, Takashi Tanaka, Takeshi Fujita, Masakazu Matsumoto, Norie Takebayashi +1 more | 1984-01-24 |
| 4423129 | Electrophotographic member having layer containing methylidenyl hydrazone compound | Yoshio Takasu, Kiyoshi Sakai, Minoru Mabuchi, Katsunori Watanabe | 1983-12-27 |