using carrier waves

Full Title

Arrangements for broadcast or for distribution combined with broadcast > Arrangements characterised by transmission systems for broadcast > Wired systems > using carrier waves

Child Classifications

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• H04H 20/78 CATV [Community Antenna Television] systems
• H04H 20/80 having frequencies in two or more frequency bands, e.g. medium wave and VHF
• H04H 20/81 combined with telephone network over which the broadcast is continuously available