Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6373933 | Method for implementing transaction-based billing for telephone services | Mika Sarkki, Martti Kosonen, Jorma Jaakkola | 2002-04-16 |
| 6208728 | Call waiting in call setup | — | 2001-03-27 |