Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8780407 | Control apparatus, image reading apparatus, image forming apparatus, and recording medium for efficient rereading | Atsuhisa Morimoto | 2014-07-15 |
| 7386242 | Image forming apparatus | Toshiki Takiguchi, Tatsuya Inoue, Kouji Wakamoto | 2008-06-10 |
| 6491976 | Method for adding hydrophilic groups to the surface of particles | Takahiro Horiuchi, Kiyofumi Morimoto | 2002-12-10 |
| 6424387 | Recording medium including liquid crystal layer | Eiji Sato, Tomoko Nishino, Masao Yamamoto | 2002-07-23 |
| 6269225 | Information recording device | Eiji Sato, Tomoko Nishino, Masao Yamamoto | 2001-07-31 |
| 6049345 | Image forming apparatus selectively charging toner using doctor blade | Yukihito Nishio, Hirokazu Fujita, Yoshinobu Okumura, Hideo Yamasa, Takeshi Iriuchijima | 2000-04-11 |
| 5602659 | Liquid crystal light valve with photoconductor including light absorbing and light blocking layers of non-alloy amorphous silicon | Katsumi Adachi, Takashi Hayakawa | 1997-02-11 |
| 5592263 | Charging device | Katsumi Adachi, Takashi Hayakawa, Yukihito Nishio, Hirofumi Yanagizawa, Takumi Sakamoto +1 more | 1997-01-07 |
| 5532796 | Image forming apparatus | Hirokazu Tanaka, Iwakazu Honda, Tomohiro Oikawa, Hiroe Ando | 1996-07-02 |
| 5324549 | Method of fabricating photoconductor coupled liquid crystal light valve | Takashi Hayakawa, Katsumi Adachi, Akitsugu Hatano | 1994-06-28 |
| 5239397 | Liquid crystal light valve with amorphous silicon photoconductor of amorphous silicon and hydrogen or a halogen | Takashi Hayakawa, Kunio Ohashi | 1993-08-24 |
| 5100749 | Photosensitive member for electrophotography | Takashi Hayakawa, Kunio Ohashi | 1992-03-31 |
| 5085968 | Amorphous, layered, photosensitive member for electrophotography and ECR process | Takashi Hayakawa, Kunio Ohashi | 1992-02-04 |
| 5057391 | Photosensitive member for electrophotography and process for making using electron cyclotron resonance | Takashi Hayakawa, Kunio Ohashi, Yoshiharu Tsujimoto | 1991-10-15 |
| 5009977 | Photosensitive member for electrophotography having amorphous silicon | Takashi Hayakawa, Kunio Ohashi, Yoshiharu Tsujimoto | 1991-04-23 |
| 4994855 | Electrophotographic image formation apparatus with two bias voltage sources | Kunio Ohashi, Yoshikazy Fujiwara, Shoichi Nagata, Kazuki Wakita, Takashi Hayakawa | 1991-02-19 |
| 4992348 | Electrophotographic photosensitive member comprising amorphous silicon | Takashi Hayakawa, Kunio Ohashi | 1991-02-12 |
| 4990423 | Photosensitive member for electrophotography | Takashi Hayakawa, Kunio Ohashi | 1991-02-05 |
| 4971878 | Amorphous silicon photosensitive member for use in electrophotography | Takashi Hayakawa, Kunio Ohashi | 1990-11-20 |
| 4943503 | Amorphous silicon photoreceptor | Hideo Nojima, Yoshimi Kojima, Eiji Imada, Toshiro Matsuyama, Takashi Hayakawa +1 more | 1990-07-24 |
| 4853309 | Photoreceptor for electrophotography with a-Si layers having a gradient concentration of doped atoms and sandwiching the photoconductive layer therebetween | Takashi Hayakawa, Hideo Nojima, Yoshimi Kojima, Toshiro Matsuyama, Eiji Imada +1 more | 1989-08-01 |
| 4666816 | Method of manufacturing an amorphous Si electrophotographic photoreceptor | Yoshimi Kojima, Takashi Hayakawa, Hideo Nojima, Eiji Imada, Toshiro Matsuyama +1 more | 1987-05-19 |
| 4615299 | Plasma CVD apparatus for making photoreceptor drum | Toshiro Matsuyama, Takashi Hayakawa, Yoshimi Kojima, Shaw Ehara | 1986-10-07 |