Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848776 | Exclusion seal assembly | — | 1989-07-18 |
| 4830128 | Four wheel steering having closed hydraulic system with pressure relief | David M. Preston | 1989-05-16 |
| 4828089 | Brake/clutch with direct liquid cooling | Marcus H. Collins | 1989-05-09 |