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PCE
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Search for IPC and CPC classification codes or keywords
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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