Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4631359 | Arrangement for supplying current to a subscriber telephone set | Jan Johansson | 1986-12-23 |
| 4631360 | Apparatus for the current supply of a subscriber set from an exchange | Jan Johansson | 1986-12-23 |
| 4617426 | Method for current supply to a subscriber telephone from a telephone exchange | Jan Johansson | 1986-10-14 |