DIFF Subgroup
G01R 21/127 by using pulse modulation (G01R21/133 takes precedence)
Introduced: January 1985
Title
Titles differ between systems:
IPC: by using pulse modulation
CPC: by using pulse modulation (G01R21/133 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Arrangements for measuring electric power or power factor > by using pulse modulation
CPC:
Arrangements for measuring electric power or power factor (G01R7/12 takes precedence) > by using pulse modulation (G01R21/133 takes precedence)
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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