IPC Main Group
H04L 23/00 Apparatus or local circuits for telegraphic systems other than those covered by groups
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1 direct subcode
Child Classifications
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- H04L 23/02 adapted for orthogonal signalling