Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4306118 | Telephone set ringing current injection device | Michel Ciboulet, Jean L. Belly | 1981-12-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4306118 | Telephone set ringing current injection device | Michel Ciboulet, Jean L. Belly | 1981-12-15 |