Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857214 | Oil-soluble phosphorus antiwear additives for lubricants | Rolfe J. Hartley | 1989-08-15 |
| 4855074 | Homogeneous additive concentrates and their formation | Joseph P. O'Brien | 1989-08-08 |
| 4795583 | Shift-feel durability enhancement | — | 1989-01-03 |