Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6656887 | Lubricating oil compositions | Kazuhiro Yagishita, Takeo Koizumi | 2003-12-02 |
| 6642189 | Engine oil compositions | Isao Kurihara, Kiyoshi Inoue | 2003-11-04 |
| 6627583 | Engine oil composition | Kiyoshi Inoue, Mituaki Ishimaru, Mineo Kagaya, Masakuni Hirata | 2003-09-30 |
| 6569819 | Lubricant compositions | Kazuhiro Yagishita, Osamu Kurosawa | 2003-05-27 |