DIFF Subgroup
H04B 17/40 of relay systems
Introduced: January 2015
Full Title
Full titles differ between systems:
IPC:
Monitoring; Testing > of relay systems
CPC:
Monitoring; Testing (of line transmission systems H04B3/46; arrangements for monitoring or testing transmission systems employing electromagnetic waves other than radio waves H04B10/07) > of relay systems
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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