Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802203 | Telephone message recording device with displays to indicate the number of calls received and messages recorded | Willy Muller | 1989-01-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802203 | Telephone message recording device with displays to indicate the number of calls received and messages recorded | Willy Muller | 1989-01-31 |