Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884401 | Three position dual failure shut-off valve system | Jeffrey D. Metcalf | 1989-12-05 |
| 4867295 | Shock absorbing overtravel stop | Jeffrey D. Metcalf | 1989-09-19 |
| 4834225 | No-back mechanism | David J. Lang | 1989-05-30 |