Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04H
BROADCAST COMMUNICATION
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20/00
Arrangements for broadcast or for distribution combined with broadcast
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H04H20/65
Arrangements characterised by transmission systems for broadcast
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H04H20/78
CATV [Community Antenna Television] systems
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H04H20/79
using downlink of the CATV systems, e.g. audio broadcast via CATV network
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