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characterised by varying the rotational speed

characterised by varying the rotational speed · Cooperative Patent Classification (CPC)

Engines, pumps, lighting, heating, and mechanical systems.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	F01C20/08
Official title	characterised by varying the rotational speed
Display label	characterised by varying the rotational speed
Total patents	8

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

Filing activity over the last five years is rapidly declining.

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