Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990816 | Piezoelectric capsule with resilient conducting holding means | Pierre Causse, Peter Graham, Jean-Claude Walter | 1991-02-05 |
| 4978880 | Piezoelectric capsule with flat supporting surface and resilient holding means | Pierre Causse, Peter Graham, Jean-Claude Walter | 1990-12-18 |
| 4947075 | Piezoelectric insert with side electric connection clips | Jean-Claude Walter, Christian Cognasse, Peter Graham | 1990-08-07 |
| 4944017 | Electroacoustic insert with added coil | Christian Cognasse, Peter Graham, Jean-Claude Walter | 1990-07-24 |