Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878207 | Composite sonar transducer for operation as a low frequency underwater acoustic source | Ian Bedwell | 1989-10-31 |
| 4862428 | Distributed array hydrophone | Stephen G. Jackett, Stephen N. Kastel | 1989-08-29 |