Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9448500 | Magnetic iron oxide particles, magnetic carrier for electrophotographic developers and process for producing the same, and two-component system developer | Shigenori Harada, Shinji Uemoto, Eiichi Kurita, Koso Aoki | 2016-09-20 |
| 9285698 | Black magnetic iron oxide particles, magnetic carrier for electrophotographic developer and two-component developer | Shinji Uemoto, Ryo Iwai, Naoki Uchida, Koso Aoki, Kazuya Fujita +3 more | 2016-03-15 |
| 8852840 | Magnetic composite particles, magnetic carrier and developer | Muneyoshi Sakamoto, Eiichi Kurita | 2014-10-07 |
| 7670676 | Pharmaceutical raw material | Nanao Horiishi, Toshiyuki Hakata, Hirofumi Kawasaki, Shinji Uemoto, Seiichi Takahashi | 2010-03-02 |
| 7597958 | Black magnetic iron oxide particles having a specific dissolution of sulfur element | Shinji Uemoto, Naoki Uchida, Mamoru Kamigaki, Ryo Iwai, Koso Aoki | 2009-10-06 |
| 7572505 | Black magnetic iron oxide particles having high breakdown voltage | Naoki Uchida, Ryo Iwai, Mamoru Kamigaki, Shinji Uemoto, Koso Aoki | 2009-08-11 |
| 7144626 | Magnetic iron oxide particles and magnetic toner using the same | Hiroshi Akai, Koso Aoki, Naoki Uchida, Ryo Iwai | 2006-12-05 |
| 6780555 | Black magnetic iron oxide particles and magnetic toner | Naoki Uchida, Minoru Kouzawa, Koso Aoki, Suehiko Miura | 2004-08-24 |
| 6596255 | Tin-containing granular magnetic oxide particles and process for producing the same | Mitsuharu Tabuchi, Tomonari Takeuchi, Hiroyuki Kageyama, Tatsuya Nakamura | 2003-07-22 |
| 6383637 | Black magnetic iron oxide particles for magnetic toner and process for producing the same | Koso Aoki, Suehiko Miura, Minoru Kozawa, Naoki Uchida, Nobuya Shimo | 2002-05-07 |
| 6103437 | Magnetic toner particles comprising magnetite particles containing silicon | Minoru Kozawa, Koso Aoki, Sigenori Miyazaki, Naoki Uchida, Kazuo Fujioka | 2000-08-15 |
| 5874019 | Magnetic particles for magnetic toner and process for producing the same | Naoki Uchida, Kazuo Fujioka, Koso Aoki, Minoru Kozawa | 1999-02-23 |
| 5858532 | Magnetite particles, magnetic iron oxide particles, process for the production of the same and magnetic toner using the same | Minoru Kozawa, Koso Aoki, Sigenori Miyazaki, Naoki Uchida, Kazuo Fujioka | 1999-01-12 |
| 5843610 | Magnetic particles for magentic toner and process for producing the same | Naoki Uchida, Kazuo Fujioka, Koso Aoki, Minoru Kozawa | 1998-12-01 |
| 5688852 | Iron oxide particles and process for producing the same | Kazuo Fujioka, Koso Aoki, Eiichi Kurita, Yoji Okano, Minoru Kozawa | 1997-11-18 |
| 5652060 | Spherical magnetic particles for magnetic toner and process for producing the same | Naoki Uchida, Kazuo Fujioka, Koso Aoki, Minoru Kozawa | 1997-07-29 |
| 5648170 | Coated granular magnetite particles and process for producing the same | Yoji Okano, Eiichi Kurita, Kazuo Fujioka, Koso Aoki, Minoru Kozawa | 1997-07-15 |
| 5599627 | Magnetic particles comprising magnetite core and process for producing the same | Koso Aoki, Yoji Okano, Minoru Kozawa, Naoki Uchida, Kazuo Fujioka | 1997-02-04 |
| 5578375 | Granular magnetite particles and process for producing the same | Yoji Okano, Kazuo Fujioka, Koso Aoki, Minoru Kozawa, Naoki Uchida | 1996-11-26 |
| 5512405 | Iron oxide particles and process for producing the same | Kazuo Fujioka, Koso Aoki, Eiichi Kurita, Yoji Okano, Minoru Kozawa | 1996-04-30 |
| 5470660 | Iron oxide particles and process for producing the same | Kazuo Fujioka, Koso Aoki, Eiichi Kurita, Yoji Okano, Minoru Kozawa | 1995-11-28 |
| 5389482 | Magnetic particle powder included in magnetic toners for magnetic image character recognition | Yoji Okano, Kazuo Fujioka, Koso Aoki, Eiichi Kurita, Yasuhiko Fujii | 1995-02-14 |
| 5328793 | Magnetic particles for magnetic toner | Kazuo Fujioka, Eiichi Kurita, Yasuhiko Fujii, Yoji Okano | 1994-07-12 |
| 5232805 | Magnetic particles containing iron as the main component and process for producing the same | Kazuo Fujioka, Eiichi Kurita, Yasuhiko Fujii, Youzi Okano | 1993-08-03 |