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| Number | Title | Issue Date |
| 6301342 | Method relating to telephone communications including the transmission of advertising messages A method relating to telecommunications in which the telephone of a first subscriber is connected to the telephone of a second subscriber via a standard telephone network and the call is billed to a third subscriber. The first subscriber first dials a sub... | 10/09/2001 |
| 6140912 | Method and a device for telecommunication A method and apparatus for forwarding and billing a telephone call, wherein a first subscriber telephone is connected to a second subscriber telephone via a standard telephone network and a third subscriber is billed for the call. The first subscriber dia... | 10/31/2000 |