G01R 21/1271 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

G01R 21/1271

Full Title

Arrangements for measuring electric power or power factor (G01R7/12 takes precedence) > by using pulse modulation (G01R21/133 takes precedence)

Of 3 combined children, 0 exist in both systems.

3 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.