Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6611821 | Method of charging for the use of an internet service plus a service control unit and a service provider unit | Uwe Stahl, Wolfgang Lautenschlager, Gerd Siegmund | 2003-08-26 |