Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6383637 | Black magnetic iron oxide particles for magnetic toner and process for producing the same | Hiromitsu Misawa, Koso Aoki, Suehiko Miura, Naoki Uchida, Nobuya Shimo | 2002-05-07 |
| 6103437 | Magnetic toner particles comprising magnetite particles containing silicon | Koso Aoki, Hiromitsu Misawa, 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, Hiromitsu Misawa | 1999-02-23 |
| 5858532 | Magnetite particles, magnetic iron oxide particles, process for the production of the same and magnetic toner using the same | Koso Aoki, Hiromitsu Misawa, 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, Hiromitsu Misawa | 1998-12-01 |
| 5688852 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, Kazuo Fujioka, Koso Aoki, Eiichi Kurita, Yoji Okano | 1997-11-18 |
| 5652060 | Spherical magnetic particles for magnetic toner and process for producing the same | Naoki Uchida, Kazuo Fujioka, Koso Aoki, Hiromitsu Misawa | 1997-07-29 |
| 5648170 | Coated granular magnetite particles and process for producing the same | Yoji Okano, Eiichi Kurita, Kazuo Fujioka, Koso Aoki, Hiromitsu Misawa | 1997-07-15 |
| 5599627 | Magnetic particles comprising magnetite core and process for producing the same | Koso Aoki, Hiromitsu Misawa, Yoji Okano, Naoki Uchida, Kazuo Fujioka | 1997-02-04 |
| 5578375 | Granular magnetite particles and process for producing the same | Yoji Okano, Kazuo Fujioka, Koso Aoki, Hiromitsu Misawa, Naoki Uchida | 1996-11-26 |
| 5512405 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, Kazuo Fujioka, Koso Aoki, Eiichi Kurita, Yoji Okano | 1996-04-30 |
| 5470660 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, Kazuo Fujioka, Koso Aoki, Eiichi Kurita, Yoji Okano | 1995-11-28 |