Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6306801 | Lubricating oil composition comprising acylated bissuccinimide, zinc dithiophosphate and metallic detergent | Kazuhiro Yagishita, Osamu Kurosawa | 2001-10-23 |
| 5912212 | Lubricating oil composition | Jinichi Igarashi, Yutaka Shikatani, Toshio Yoshida | 1999-06-15 |
| 5658865 | Oxidation-inhibitive lubricating oil composition | Toshio Yoshida, Jinichi Igarashi | 1997-08-19 |
| 5658866 | Lubricating oil compositions | Toshio Yoshida, Jinichi Igarashi | 1997-08-19 |