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Video distribution system
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System for accessing and paying for amenities using a telephone
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System for accessing amenities through a public telephone network
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Current detection circuit and method
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Hotel/motel power load control and bilateral signalling apparatus
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System for monitoring and controlling communication tv
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Video signal distribution system
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Cable TV system with return signalling - incorporates return-signalling coder controlling RF source using transformers
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Communication TV monitoring and control system
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Clock gated digital data encoding circuit
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Burst frequency shift keying data communication system
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All saturated switching mode solid state RF amplifier
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