Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8481467 | Lubricating oil additive and lubricating oil composition | Kazuhiro Yagishita | 2013-07-09 |
| 7612025 | Lubricating oil composition | Isao Kurihara, Kazuhiro Yagishita | 2009-11-03 |