Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6063741 | Engine oil composition | Yasushi Naitoh | 2000-05-16 |
| 5707942 | Lubricating oil composition | Katsuya Arai, Satoshi Asano, Shigeyuki Yoshizawa, Takashi Kikuchi | 1998-01-13 |
| 5382374 | Hydraulic fluids for automobile suspensions | Koji Takemitsu, Hiroshi Ohashi, Syoichi Ichikawa | 1995-01-17 |
| 4968453 | Synthetic lubricating oil composition | Sadao Wada, Michihide Tokashiki | 1990-11-06 |
| 4719025 | Synthetic lubrication oil compositions | Sadao Wada, Michihide Tokashiki | 1988-01-12 |