Issued Patents All Time
Showing 1–25 of 27 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, Hiromitsu Misawa, Eiichi Kurita | 2016-09-20 |
| 9285698 | Black magnetic iron oxide particles, magnetic carrier for electrophotographic developer and two-component developer | Shinji Uemoto, Hiromitsu Misawa, Ryo Iwai, Naoki Uchida, Kazuya Fujita +3 more | 2016-03-15 |
| 9085673 | Aniline black having specific sulfur content, and resin composition and water-based and solvent-based dispersions using the aniline black | Yusuke Shimohata, Kohei Uehara, Nobuya Shimo | 2015-07-21 |
| 7597958 | Black magnetic iron oxide particles having a specific dissolution of sulfur element | Shinji Uemoto, Naoki Uchida, Mamoru Kamigaki, Ryo Iwai, Hiromitsu Misawa | 2009-10-06 |
| 7572505 | Black magnetic iron oxide particles having high breakdown voltage | Naoki Uchida, Ryo Iwai, Mamoru Kamigaki, Shinji Uemoto, Hiromitsu Misawa | 2009-08-11 |
| 7144626 | Magnetic iron oxide particles and magnetic toner using the same | Hiroshi Akai, Hiromitsu Misawa, Naoki Uchida, Ryo Iwai | 2006-12-05 |
| 6844067 | Black iron-based particles and black toner containing the same | Nobuya Shimo, Hiromitsu Sakurai, Shinji Uemoto | 2005-01-18 |
| 6780555 | Black magnetic iron oxide particles and magnetic toner | Naoki Uchida, Minoru Kouzawa, Hiromitsu Misawa, Suehiko Miura | 2004-08-24 |
| 6383637 | Black magnetic iron oxide particles for magnetic toner and process for producing the same | Hiromitsu Misawa, Suehiko Miura, Minoru Kozawa, Naoki Uchida, Nobuya Shimo | 2002-05-07 |
| 6103437 | Magnetic toner particles comprising magnetite particles containing silicon | Minoru Kozawa, Hiromitsu Misawa, Sigenori Miyazaki, Naoki Uchida, Kazuo Fujioka | 2000-08-15 |
| 5922464 | Iron oxide particles | Kazuyuki Hayashi, Minoru Ohsugi, Hiroko Morii | 1999-07-13 |
| 5874019 | Magnetic particles for magnetic toner and process for producing the same | Naoki Uchida, Kazuo Fujioka, 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, 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, Hiromitsu Misawa, Minoru Kozawa | 1998-12-01 |
| 5693690 | Rubber or resin composition | Kazuyuki Hayashi, Minoru Ohsugi, Hiroko Morii | 1997-12-02 |
| 5688852 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, Kazuo Fujioka, 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, Hiromitsu Misawa, Minoru Kozawa | 1997-07-29 |
| 5648170 | Coated granular magnetite particles and process for producing the same | Yoji Okano, Eiichi Kurita, Kazuo Fujioka, Hiromitsu Misawa, Minoru Kozawa | 1997-07-15 |
| 5599627 | Magnetic particles comprising magnetite core and process for producing the same | Hiromitsu Misawa, 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, Hiromitsu Misawa, Minoru Kozawa, Naoki Uchida | 1996-11-26 |
| 5512405 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, Kazuo Fujioka, Eiichi Kurita, Yoji Okano, Minoru Kozawa | 1996-04-30 |
| 5470660 | Iron oxide particles and process for producing the same | Hiromitsu Misawa, Kazuo Fujioka, Eiichi Kurita, Yoji Okano, Minoru Kozawa | 1995-11-28 |
| 5449565 | Magnetic iron oxide particles, a process for producing the same and a magnetic recording medium | Hiroshi Sumita, Nanao Horiishi | 1995-09-12 |
| 5389482 | Magnetic particle powder included in magnetic toners for magnetic image character recognition | Yoji Okano, Kazuo Fujioka, Hiromitsu Misawa, Eiichi Kurita, Yasuhiko Fujii | 1995-02-14 |
| 5368933 | Superparamagnetic fine particles of iron oxide and magnetic recording media containing said particles | Masaaki Fukugauchi, Tomoyuki Imai, Nanao Horiishi, Kazuyuki Hayashi | 1994-11-29 |