Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6580661 | Hydrophone array | Richard A. Marschall, Graham Holt | 2003-06-17 |
| 5742559 | Hydrophone and array thereof | Richard A. Marschall | 1998-04-21 |
| 5742562 | Hydrophone array | Richard A. Marschall | 1998-04-21 |