Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5658865 | Oxidation-inhibitive lubricating oil composition | Toshio Yoshida, Jinichi Igarashi | 1997-08-19 |
| 5658866 | Lubricating oil compositions | Toshio Yoshida, Jinichi Igarashi | 1997-08-19 |