IPC Subgroup
H04Q 3/2 for preselectors
Introduced: September 1968
Last revised: January 2006
Full Title
Selecting arrangements > Circuit arrangements for first stage of hunting switching > for preselectors
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- SELECTING
1 direct subcode
Child Classifications
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- H04Q 3/22 comprising common calling and disconnecting circuit