DIFF Subgroup
H04Q 3/555 being comprised by electro-magnetic devices
Introduced: January 1985
Full Title
Full titles differ between systems:
IPC:
Selecting arrangements > Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker > in which the logic circuitry controlling the exchange is centralised > using wired logic circuitry > being comprised by electro-magnetic devices
CPC:
Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence) > Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker > in which the logic circuitry controlling the exchange is centralised > using wired logic circuitry > being comprised by electro-magnetic devices
No child classifications to compare. This is a leaf node in both IPC and CPC.