IPC Main Group
H04S 1/00 Two-channel systems
Introduced: January 1980
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- STEREOPHONIC SYSTEMS
Scope Notes
Limiting references: Pseudo-stereophonic systems Indicating arrangements of stereophonic systems; Control arrangements, e.g. balance control of stereophonic systems