IPC Subgroup
G08C 19/14 using combination of fixed frequencies
Introduced: September 1968
Last revised: January 2006
Full Title
Electric signal transmission systems > in which the signal transmitted is frequency or phase of AC > using combination of fixed frequencies
Classification Context
- Section:
- PHYSICS
- Class:
- SIGNALLING
- Subclass:
- TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS