H03D 13/003 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

H03D 13/003

Full Title

Circuits for comparing the phase or frequency of two mutually-independent oscillations

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.