Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5099454 | Liquid presence detector having a composite waveguide for acoustic waves | Daniel Royer, Olivier Legras | 1992-03-24 |
| 4954997 | Sensor device using lamb elastic waves for detecting the presence of a liquid at a predetermined level | Daniel Royer, Olivier Legras | 1990-09-04 |
| 4765186 | Liquid level detector by guided elastic waves | Daniel Royer | 1988-08-23 |
| 4706046 | Resonator made of nonpiezoelectric material with high quality coefficient | Daniel Royer | 1987-11-10 |
| 4393268 | Marking system using elastic surface waves | Richard Guedj, Daniel Royer | 1983-07-12 |
| 4272676 | Optical-pickup coordinatometer | Daniel Royer, Richard Guedj | 1981-06-09 |
| 4209725 | Selenium layer piezoelectric device | Daniel Royer, Richard Guedj | 1980-06-24 |