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PCE
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DIFF Subgroup
H04Q 3/20

for preselectors

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Selecting arrangements > Circuit arrangements for first stage of hunting switching > for preselectors

CPC:

Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence) > Circuit arrangements for first stage of hunting switching > for preselectors

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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  • H04Q 3/22 comprising common calling and disconnecting circuit IPC+CPC Available in IPC and CPC