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| Number | Title | Issue Date |
| 7664100 | Voice-over-IP telephone devices and systems A method for a service provider to provide telephone service between a first telephone and a second telephone includes connecting to the first telephone, receiving a request from the first telephone to make a call to the second telephone using a VoIP number, mapping... | 02/16/2010 |
| 7620035 | Voice-over-IP device using dial-up modem A network telephone device includes a subscriber line/loop interface circuit (SLIC) for coupling to an analog telephone, a telephony processor coupled to the SLIC, and a dial-up modem coupled to the telephony processor. The telephony processor converts outgoing tele... | 11/17/2009 |
| 7209732 | Audio scrambler and recorder for cellular telephones A security device for a cellular telephone includes a cellular telephone interface for coupling the device to the cellular telephone, a microphone, a speaker, and an analog scrambler coupling the microphone and the speaker to the cellular telephone interface. The sc... | 04/24/2007 |
