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Devices for lubricating or polishing slip-rings or commutators during operation of the collector

Devices for lubricating or polishing slip-rings or commutators during operation of the collector · 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	H01R39/56
Official title	Devices for lubricating or polishing slip-rings or commutators during operation of the collector
Display label	Devices for lubricating or polishing slip-rings or commutators during operation of the collector
Total patents	11

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

Filing activity over the last five years is declining.

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