Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4771858 | Shear wave vibrator vehicle isolation system | — | 1988-09-20 |
| 4639905 | Dual-mode vibrator | — | 1987-01-27 |
| 4516230 | Protective drive-level limiter for an electro-hydraulic vibrator | Ralph A. Landrum, Jr. | 1985-05-07 |