Issued Patents All Time
Showing 26–50 of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7902382 | Thiophene-containing compound and thiophene-containing compound polymer, organic electroluminescent device, production method thereof, and image display medium | Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Koji Horiba +8 more | 2011-03-08 |
| 7812172 | Thiazolothiazole derivative | Koji Horiba, Hidekazu Hirose, Akira Imai, Katsuhiro Sato | 2010-10-12 |
| 7763737 | Carbazole compound, and polymer thereof | Hidekazu Hirose, Koji Horiba, Katsuhiro Sato, Kazuaki Sato, Yoshihiro Ohba | 2010-07-27 |
| 7749618 | Organic electroluminescent device, production method thereof, and image display medium | Koji Horiba, Hidekazu Hirose, Mieko Seki, Akira Imai, Tadayoshi Ozaki +6 more | 2010-07-06 |
| 7705114 | Method for producing polymer organic electronic material, polymer organic electronic material, and organic electroluminescent device | Tadayoshi Ozaki, Mieko Seki, Yohei Nishino, Koji Horiba, Hirohito Yoneyama +6 more | 2010-04-27 |
| 7659410 | Thiophene-containing compound and thiophene-containing compound polymer, organic electroluminescent device, production method thereof, and image display medium | Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Koji Horiba +8 more | 2010-02-09 |
| 7589166 | Thiophene-containing compound and polymer thereof | Yoshihiro Ohba, Kazuaki Sato, Yohei Nishino, Mieko Seki, Kiyokazu Mashimo +5 more | 2009-09-15 |
| 7455916 | Organic electroluminescent element | Hidekazu Hirose, Daisuke Okuda, Mieko Seki, Tadayoshi Ozaki, Hirohito Yoneyama +3 more | 2008-11-25 |
| 7183009 | Organic electroluminescent element | Hidekazu Hirose, Mieko Seki, Hirohito Yoneyama, Daisuke Okuda, Tadayoshi Ozaki +3 more | 2007-02-27 |
| 7166859 | Organic semiconductor transistor element, semiconductor device using the same, and process for producing the semiconductor device | Hidekazu Hirose, Mieko Seki, Daisuke Okuda, Tadayoshi Ozaki, Toru Ishii +4 more | 2007-01-23 |
| 7153980 | Thiophene-containing compound and thiophene-containing compound polymer | Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Katsuhiro Sato, Kiyokazu Mashimo +2 more | 2006-12-26 |
| 7060783 | Diamine compound polymer having condensed aromatic group | Mieko Seki, Hirohito Yoneyama, Daisuke Okuda, Hidekazu Hirose, Tadayoshi Ozaki +4 more | 2006-06-13 |
| 6936679 | Charge-transporting polymer | Mieko Seki, Hirohito Yoneyama, Daisuke Okuda, Hidekazu Hirose, Tadayoshi Ozaki +3 more | 2005-08-30 |
| 6872476 | Organic electro-luminescent device | Tadayoshi Ozaki, Mieko Seki, Hirohito Yoneyama, Daisuke Okuda, Hidekazu Hirose +3 more | 2005-03-29 |
| 6670052 | Organic light emitting diode | Hidekazu Hirose, Daisuke Okuda, Hirohito Yoneyama, Mieko Seki, Kiyokazu Mashimo +1 more | 2003-12-30 |
| 6652995 | Organic electroluminescence device | Mieko Seki, Daisuke Okuda, Hirohito Yoneyama, Hidekazu Hirose, Kiyokazu Mashimo +1 more | 2003-11-25 |
| 6517961 | Electrostatic charge regulator, method for making same, and image forming method using same | Noriaki Yamazaki, Kei Shimotani | 2003-02-11 |
| 6383639 | Charging member, electrostatic latent image developer using the same, image forming apparatus and image forming method | — | 2002-05-07 |
| 5965063 | Charge transporting material and method of preparing charge transporting particulates used therein | Masakazu Iijima, Wataru Yamada, Katsumi Nukada, Yasuhiro Yamaguchi, Taketoshi Hoshizaki | 1999-10-12 |
| 5932387 | Charged member for electrostatic development and sleeve for electrostatic development | Yasuo Yamamoto, Masato Mikami, Kazuhiko Yanagida, Suk Kim | 1999-08-03 |
| 5800957 | Toner for electrostatic latent image development and process for producing the same | Takashi Imai | 1998-09-01 |
| 5747206 | Electrophotographic photoreceptor | Akira Imai, Yasuo Yamamoto, Yutaka Sugizaki, Katsuhiro Sato | 1998-05-05 |
| 5698355 | Photosensitive body for electrophotography | Akira Imai, Yasuo Yamamoto, Yutaka Sugizaki, Katsuhiro Sato | 1997-12-16 |
| 5639582 | Electrophotographic toner composition and process for the preparation thereof | Takashi Imai | 1997-06-17 |
| 5510219 | Toner for electrostatic-image development and process for producing the same | Takashi Imai | 1996-04-23 |