IPC Subgroup
H04B 1/74 for increasing reliability, e.g. using redundant or spare channels or apparatus
Introduced: January 1980
Last revised: January 2006
Full Title
Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission > for increasing reliability, e.g. using redundant or spare channels or apparatus
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION