Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6155196 | Multi-depth acoustic signal generating device | Edmund J. Sullivan | 2000-12-05 |
| 6142094 | Depth sensitive mechanical acoustic signal generating device | Edmund J. Sullivan | 2000-11-07 |