Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834897 | Gear oil lubricant additive composition | Rodney L. Sung, Ronald L. O'Rourke | 1989-05-30 |
| 4808335 | Oxidation and corrosion resistant diesel engine lubricant | Rodney L. Sung, Ronald L. O'Rourke | 1989-02-28 |