Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867286 | Shock absorber having fluid amplified piston head with relief valve which provides second stage of fluid amplification | — | 1989-09-19 |
| 4819919 | Boot seal for liquid spring used in corrosive environments | — | 1989-04-11 |
| 4815574 | Frictionless damper | David A. Lee | 1989-03-28 |