Patent Classification Explorer PCE

DIFF Main Group

H03J 7/00

Automatic frequency control; Automatic scanning over a band of frequencies

Introduced: January 1980

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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H03J 7/02 Automatic frequency control (H03J7/18 takes precedence) since 1980 +2 CPC IPC+CPC Available in IPC and CPC
H03J 7/18 Automatic scanning over a band of frequencies since 1980 +1 CPC IPC+CPC Available in IPC and CPC