Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6094402 | Ultrasonic transducer | Neil G. Murray, Jr. | 2000-07-25 |
| 5991234 | Ultrasonic sensor system and method having automatic excitation frequency adjustment | Frederic Marcel Sejalon, Michelle R. Schaffran | 1999-11-23 |
| 5826880 | Multi-level chess game with additional chess pieces | — | 1998-10-27 |
| 4315482 | Three-dimensional phonetic alphabet | Charles Cooper | 1982-02-16 |
| 4245587 | Method for communicating with aquatic mammals | Charles Cooper | 1981-01-20 |