IPC Subgroup
H04B 3/21 using a set of bandfilters
Introduced: January 1980
Last revised: January 2006
Full Title
Line transmission systems > Details > Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other > using a set of bandfilters
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION