Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832860 | Lubricating oil for metal working | Hiroo Mitazaki, Seiichi Shido, Yasunori Tomari, Kenji Onodera | 1989-05-23 |
| 4828731 | Lubricating oil composition for working metal | — | 1989-05-09 |