Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5672572 | Lubricating oil composition | Katsuya Arai, Satoshi Asano | 1997-09-30 |
| 5665684 | Lubricating oil composition | Katsuya Arai, Satoshi Asano | 1997-09-09 |
| 4968453 | Synthetic lubricating oil composition | Kenyu Akiyama, Michihide Tokashiki | 1990-11-06 |
| 4719025 | Synthetic lubrication oil compositions | Kenyu Akiyama, Michihide Tokashiki | 1988-01-12 |
| 4608173 | Filter | Koh Watanabe, Michihide Tokashiki | 1986-08-26 |