Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9624453 | Lubricating oil composition and automotive transmission oil using same | Toshihiko Ichihashi, Masato YOKOMIZO | 2017-04-18 |
| 7897551 | Lubricants for power transmission | Hitoshi Hata, Yukitoshi Fujinami | 2011-03-01 |
| 7550414 | Lube based oil and lubricating oil composition | — | 2009-06-23 |
| 5458807 | Engine oil composition | — | 1995-10-17 |
| 4776967 | Lubricating oil composition | Toshihiko Ichihashi | 1988-10-11 |