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PCE
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CPC Subgroup
H04B 3/20

Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Full Title

Line transmission systems (combined with near-field transmission systems H04B5/00) > Details > Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

2 direct subcodes

Child Classifications

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  • H04B 3/21 using a set of bandfilters