Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5858932 | Internal combustion engine oil composition | Masahiko Kido, Hiroshi Fujita | 1999-01-12 |
| 5516440 | Lubricating oil composition | Akio Imahasi, Katsumi Katsuta | 1996-05-14 |
| 5273672 | Lubricating oil composition containing a partial ester of a polyhydric alcohol and a substituted succinic acid ester | Tsutomu Akita, Masaharu Sasaki | 1993-12-28 |
| 5064546 | Lubricating oil composition | — | 1991-11-12 |