Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885726 | Compound hydraulic seismic source vibrator | — | 1989-12-05 |
| 4881210 | Torsionally rigid support apparatus for marine seismic transducer | Jack H. Cole | 1989-11-14 |
| 4881211 | Multiple frequency range hydraulic actuator | — | 1989-11-14 |
| 4853905 | Seal for marine seismic source | — | 1989-08-01 |