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IPC Main Group
H04J 1/00

Frequency-division multiplex systems

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
MULTIPLEX COMMUNICATION

Related Keywords

multiplex systems using FREQUENCY division

3 direct subcodes

Child Classifications

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  • H04J 1/18 in which all the carriers are amplitude-modulated
  • H04J 1/2 in which at least one carrier is angle-modulated