Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12049023 | Instrument for direct measurement of air content in a liquid using a resonant electroacoustic transducer | Dawn F. Stancavish, Nathan A. Tregger, Mark F. Roberts, David F. Myers, Stephen P. Klaus | 2024-07-30 |
| 8320218 | Hidden ultrasonic transducer with beam angle control for non-contact target detection systems | — | 2012-11-27 |
| 8085621 | Ultrasonic transducer with improved method of beam angle control | — | 2011-12-27 |
| 5729507 | Directional energy receiving systems for use in the indication of the direction of arrival of the received signal | Frank Massa | 1998-03-17 |
| 4868799 | Means for equalizing the internal pressure in an underwater transducer employing a vibratile piston to permit operation of the transducer at water depths in excess of a few hundred feet | — | 1989-09-19 |
| 4769795 | Method of making an underwater electroacoustic transducer with long-lasting high leakage resistance | Frank Massa | 1988-09-06 |
| 4700333 | Hydrophone design to overcome reduction in leakage resistance between electrode surface of transducer element assembly and the water in which the hydrophone is immersed | Frank Massa | 1987-10-13 |
| 4641290 | Low frequency portable lightweight sonar systems and their method of deployment for greatly increasing the efficiency of submarine surveillance over large areas | Frank Massa | 1987-02-03 |
| 4450436 | Acoustic alarm repeater system | — | 1984-05-22 |
| 4189719 | Intrusion alarm systems | James Gregory Hall | 1980-02-19 |