Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D301032 | Telephone set | — | 1989-05-09 |
| 4817138 | Telephone having a handset and a rase each having a receiver and microphone | Markus Kappeler | 1989-03-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D301032 | Telephone set | — | 1989-05-09 |
| 4817138 | Telephone having a handset and a rase each having a receiver and microphone | Markus Kappeler | 1989-03-28 |