Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847896 | Monolithically integratable telephone circuit for supplying ringing signals to a subscriber's telephone line and for detecting an off the hook condition during ringing | Marco Siligoni, Jean-Louis Lavoisard | 1989-07-11 |
| 4841565 | Monolithically integratable telephone circuit for feeding a subscriber's telephone line | Marco Siligoni, Emilio Lorena | 1989-06-20 |