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Arrangements for signalling the class or number of called or calling line from one exchange to another

Arrangements for signalling the class or number of called or calling line from one exchange to another · Cooperative Patent Classification (CPC)

Electric circuits, power, telecommunications, and semiconductors.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	H04M5/18
Official title	Arrangements for signalling the class or number of called or calling line from one exchange to another
Display label	Arrangements for signalling the class or number of called or calling line from one exchange to another
Total patents	4

Year-over-year patent counts classified under this CPC code.

Filing activity appears stable based on the most recent years.

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.