- AIM Geophysical Group LTD
- Century Seismic
- First Seismic Corp
- First Seismic Corp
- Frontier Petroleum Svc Inc
- Frontier Petroleum Svc Inc
- Geokinetics Inc
- Geokinetics Inc
- Geophysical Pursuit Inc
- Geophysical Pursuit Inc
- Geotrak Corp
- Geotrak Corp
- Grant Geophysical Inc
- Grant Geophysical Inc
- Landmark Graphics Corp
- Landmark Graphics Corp
- Millenium Seismic
- Millenium Seismic
- Seismic Assistants
- Seismic Exchange Inc
