Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6103437 | Magnetic toner particles comprising magnetite particles containing silicon | Minoru Kozawa, Koso Aoki, Hiromitsu Misawa, Sigenori Miyazaki, Naoki Uchida | 2000-08-15 |
| 5874019 | Magnetic particles for magnetic toner and process for producing the same | Naoki Uchida, Koso Aoki, Hiromitsu Misawa, 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, Hiromitsu Misawa, Sigenori Miyazaki, Naoki Uchida | 1999-01-12 |
| 5843610 | Magnetic particles for magentic toner and process for producing the same | Naoki Uchida, Koso Aoki, Hiromitsu Misawa, Minoru Kozawa | 1998-12-01 |
| 5688852 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, 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, Koso Aoki, Hiromitsu Misawa, Minoru Kozawa | 1997-07-29 |
| 5648170 | Coated granular magnetite particles and process for producing the same | Yoji Okano, Eiichi Kurita, Koso Aoki, Hiromitsu Misawa, Minoru Kozawa | 1997-07-15 |
| 5599627 | Magnetic particles comprising magnetite core and process for producing the same | Koso Aoki, Hiromitsu Misawa, Yoji Okano, Minoru Kozawa, Naoki Uchida | 1997-02-04 |
| 5578375 | Granular magnetite particles and process for producing the same | Yoji Okano, Koso Aoki, Hiromitsu Misawa, Minoru Kozawa, Naoki Uchida | 1996-11-26 |
| 5512405 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, Koso Aoki, Eiichi Kurita, Yoji Okano, Minoru Kozawa | 1996-04-30 |
| 5470660 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, 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, Koso Aoki, Hiromitsu Misawa, Eiichi Kurita, Yasuhiko Fujii | 1995-02-14 |
| 5336421 | Spinel-type spherical, black iron oxide particles and process for the producing the same | Eiichi Kurita, Haruki Kurokawa | 1994-08-09 |
| 5328793 | Magnetic particles for magnetic toner | Hiromitsu Misawa, Eiichi Kurita, Yasuhiko Fujii, Yoji Okano | 1994-07-12 |
| 5232805 | Magnetic particles containing iron as the main component and process for producing the same | Hiromitsu Misawa, Eiichi Kurita, Yasuhiko Fujii, Youzi Okano | 1993-08-03 |
| 5118587 | Magnetic particles used for electrostatic latent image developer and process for producing the same | Shigeru Takaragi, Toshiyuki Hakata, Tetsuro Toda | 1992-06-02 |
| 5108862 | Composite carrier particles for electrophotography and process for producing the same | Souichiro Kishimoto, Tsutomu Sakaida, Yoshiaki Echigo, Keiichi Asami, Tetsuro Toda +3 more | 1992-04-28 |