Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12421132 | Sodium ferrite particle powder and production method thereof | Muneyoshi Sakamoto, Eiichi Kurita | 2025-09-23 |
| 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, Koso Aoki | 2015-07-21 |
| 8545713 | Black magnetic iron oxide particles | Ryo Iwai, Mamoru Kamigaki, Naoki Uchida | 2013-10-01 |
| 7105046 | Black perylene pigment and process for producing the same | Jin Mizuguchi | 2006-09-12 |
| 7083675 | Black perylene-based pigment and process for producing the same | Jin Mizuguchi | 2006-08-01 |
| 6844067 | Black iron-based particles and black toner containing the same | Koso Aoki, Hiromitsu Sakurai, Shinji Uemoto | 2005-01-18 |
| 6383637 | Black magnetic iron oxide particles for magnetic toner and process for producing the same | Hiromitsu Misawa, Koso Aoki, Suehiko Miura, Minoru Kozawa, Naoki Uchida | 2002-05-07 |