Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830719 | Method for etching piston rings | David Robert Adams, Johnathan D. Philby, Alan D. Pope, David F. Spence | 1989-05-16 |
| 4795682 | Tin-cobalt bearing overlay alloys | Michael Roy Turner, John K. Dennis | 1989-01-03 |