Off premises cable television interdiction apparatus comprises a microprocessor actuation and control means for actuating and controlling at least one frequency agile voltage controlled oscillator. The voltage controlled oscillator selectively jams only unauthorized premium programming transmitted in...http://www.google.es/patents/US5287539?utm_source=gb-gplus-sharePatente US5287539 - Interdiction program denial system for jamming audio and video signals
Interdiction program denial system for jamming audio and video signals
