Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4511999 | Gun shot control unit for seismic exploration | Edgar A. Bowden, Gerard D. Koeijmans | 1985-04-16 |
| 4446537 | Electronic system for release of on-bottom seismometer unit | Edgar A. Bowden, Gerard D. Koeijmans | 1984-05-01 |
| 4422164 | On-bottom seismometer electronic system | Edgar A. Bowden, Gerard D. Koeijmans | 1983-12-20 |