IPC Subgroup
H04M 11/1 with dictation recording and playback systems
Introduced: September 1968
Last revised: January 2006
Full Title
Telephonic communication systems specially adapted for combination with other electrical systems > with dictation recording and playback systems
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TELEPHONIC COMMUNICATION