using the same frequency for two directions of communication (H04B1/44 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: using the same frequency for two directions of communication

CPC: using the same frequency for two directions of communication (H04B1/44 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission > Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving > Circuits > using the same frequency for two directions of communication

CPC:

Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission > Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving > Circuits > using the same frequency for two directions of communication (H04B1/44 takes precedence)

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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H04B 1/56 with provision for simultaneous communication in two directions IPC+CPC Available in IPC and CPC
H04B 1/58 Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa +5 CPC IPC+CPC Available in IPC and CPC