Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867892 | Antiwear additives for lubricating oils | Christopher John May | 1989-09-19 |
| 4826612 | Method of reducing the wear of metal and ceramic surfaces | Alan G. Blahey, William N. Rogers | 1989-05-02 |