Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5878342 | Supervisory audio tone (SAT) approximation in an analog cellular mobile radio telephone system | Sven Gunnar Johnny Lidfors, Jan-Erik Lundberg, Lars Wahlstrom | 1999-03-02 |
| 5797095 | Supervisory audio tone-signalling tone(SAT-ST) handling | Jan-Erik Lundberg | 1998-08-18 |