Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6070461 | System for detection and measurement of atmospheric movement | Dag T. Gjessing, Jens Hjelmstad | 2000-06-06 |
| 4843597 | System for marine seismic exploration | Dag K. T. Gjessing, Jens Hjelmstad | 1989-06-27 |