DIFF Subgroup
H04B 3/04 Control of transmission; Equalising
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Line transmission systems > Details > Control of transmission; Equalising
CPC:
Line transmission systems (combined with near-field transmission systems H04B5/00) > Details > Control of transmission; Equalising
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
Child Classifications
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