Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5652201 | Lubricating oil compositions and concentrates and the use thereof | Andrew G. Papay | 1997-07-29 |
| 5612295 | Lubricant additive compositions | Donald R. Bell, Andrew G. Papay | 1997-03-18 |