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Touchtone Technologies, Inc.
| Touchtone Technologies, Inc. Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20080220739 | BILLING A COLLECT CALL TO A CELLULAR TELEPHONE - There is provided a method for billing a collect call to a cellular telephone. The method includes (a) obtaining, from a party at a cellular telephone, consent to pay for a call, and (b) sending to the cellular telephone, a text message that contains an invoice for the call. | 09-11-2008 |