Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D306727 | Telephone set | — | 1990-03-20 |
| D303966 | Telephone station | — | 1989-10-10 |
| D291308 | Telephone set base | Andreas Preussner | 1987-08-11 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D306727 | Telephone set | — | 1990-03-20 |
| D303966 | Telephone station | — | 1989-10-10 |
| D291308 | Telephone set base | Andreas Preussner | 1987-08-11 |