Stand-alone utility device with antitheft code with method for i

Details Stand-alone utility device with antitheft code with method for i Stand-alone utility device with antitheft code with method for i

1988-12-28

1991-01-22

Buczinski, Stephen C.

Cryptography

Cryptanalysis

340571, 34082531, 380 2, 455 1, H04K 102, H04K 300, G08B 1314

Patent

active

049875949

ABSTRACT:
A stand-alone utility device for perceptible reproduction of signals, for example a radio receiver or a TV receiver, is protected from theft because the reproduction quality of the signals is disturbed in the case of unauthorized use by regular suppression of the signal, by generating bleeps or by a combination of both.

REFERENCES:
patent: 4367557 (1983-01-01), Stern et al.
patent: 4494114 (1985-01-01), Kaish
patent: 4760597 (1988-07-01), Hayes et al.
patent: 4769838 (1988-09-01), Hasegawa
patent: 4837820 (1989-06-01), Bellavia, Jr.

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