Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6424704 | Method of charging a subscriber for communication service according to the usage time in a telecommunication switching system | — | 2002-07-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6424704 | Method of charging a subscriber for communication service according to the usage time in a telecommunication switching system | — | 2002-07-23 |