IPC Subgroup
H04Q 3/42 Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
Introduced: September 1968
Last revised: January 2006
Full Title
Selecting arrangements > Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- SELECTING
7 direct subcodes
Child Classifications
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- H04Q 3/44 using revertive control
- H04Q 3/46 using signals other than revertive impulses
- H04Q 3/47 using translators
- H04Q 3/48 using markers
- H04Q 3/52 using static devices in switching stages, e.g. electronic switching arrangements
- H04Q 3/54 in which the logic circuitry controlling the exchange is centralised
- H04Q 3/56 in which the control signals are multiplexed