Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5222129 | Telephone charging signalling detector suitable for central office line interface circuits | Robert Girard, Michel Canonne | 1993-06-22 |
| 5218635 | Low-frequency alternating current signal detector, in particular for central office line interface circuits | Robert Girard, Daniel Perrein | 1993-06-08 |
| 5177735 | Private telephone installation architecture | Raymond Blaszykowski, Robert Girard | 1993-01-05 |
| 5125027 | Central office line interface circuit for an analog network private telephone installation | Raymond Blaszykowski, Robert Girard | 1992-06-23 |