Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4355206 | Ringing control device | Jean-Louis Lavoisard, Jean-Claude Marchand | 1982-10-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4355206 | Ringing control device | Jean-Louis Lavoisard, Jean-Claude Marchand | 1982-10-19 |