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Piston or piston-rod used as valve members {(F01L25/066 takes precedence)}

Piston or piston-rod used as valve members {(F01L25/066 takes precedence)} · 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	F01L21/02
Official title	Piston or piston-rod used as valve members {(F01L25/066 takes precedence)}
Display label	Piston or piston-rod used as valve members {(F01L25/066 takes precedence)}
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.