Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858741 | Friction clutch for a vehicle | Robert J. Ball, Denzil J. W. Symonds | 1989-08-22 |
| 4821860 | Friction facing material and carrier assembly | Peter F. Crawford, Graham R. Bicknell | 1989-04-18 |