Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858206 | Ring-shell projector | — | 1989-08-15 |
| 4855964 | Vented-pipe projector | Bryce L. Fanning | 1989-08-08 |
| 4800542 | Tilt sensor for resolving left-right ambiguity in underwater acoustic detection systems | J. Barrie Franklin | 1989-01-24 |