Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6403695 | Carbon black and rubber compositions containing same | Akimasa Arita, Takeo Ito, Kazue Watanabe | 2002-06-11 |
| 6228928 | Carbon black and rubber composition containing same | Yoichi Yuza, Takeo Ito, Kazue Watanabe, Ted W. Bush, Martin C. Green +1 more | 2001-05-08 |
| 5212226 | Carbon black having a high specific surface area | Kazuyoshi Watanabe | 1993-05-18 |
| 5110576 | Carbon black having a high specific surface area | Kazuyoshi Watanabe | 1992-05-05 |
| 5093407 | Carbon blacks and rubber compositions containing the carbon blacks | Yasumi Komai | 1992-03-03 |