Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7167556 | Circuit and method for stimulation of a telephone apparatus | Timo Tamminen, Jari Koskela | 2007-01-23 |
| 5898697 | Arrangement for defining a transmission delay in a subscriber network | Juha Heikkila | 1999-04-27 |
| 5754555 | Subscriber network arrangement for connecting subscribers to a telephone network | Juha Heikkila | 1998-05-19 |