Audio scrambler and recorder for cellular telephones

Details Audio scrambler and recorder for cellular telephones Audio scrambler and recorder for cellular telephones

2007-04-24

2007-04-24

Eng, George (Department: 2617)

Telecommunications

Radiotelephone system

Security or fraud prevention

C380S270000, C380S247000

Reexamination Certificate

active

11044113

ABSTRACT:
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 scrambler is able to scramble voice audio from the speaker and unscramble voice audio from the cellular telephone. The device may further include a radio tuner for providing radio audio to the user through the speaker, and a recorder for recording the voice and the radio audios.

REFERENCES:
patent: 5787180 (1998-07-01), Hall et al.
patent: 6782102 (2004-08-01), Blanchard et al.
patent: 2003/0061493 (2003-03-01), Angelo et al.
patent: 2005/0245234 (2005-11-01), Stopek
“Cordless Telephone Scrambler FX128,” CML Semiconductor Products Data Sheet, D/128/1 Oct. 1997, pp. 1-10.

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