Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5062083 | Ping elongator-modulator for realistic echo synthesis | Keith E. Geren | 1991-10-29 |
| 4387352 | Transducer array crossover network | — | 1983-06-07 |
| 4306301 | Wide band frequency shifter in variable amounts | Keith E. Geren | 1981-12-15 |
| 4219885 | Sonar target simulator | Keith E. Geren, Peter Huisveld, Jr., Milton D. Papineau | 1980-08-26 |
| 4198703 | Submarine simulating sonar beacon | Peter Huisveld, Jr., Milton D. Papineau | 1980-04-15 |