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Oscillating-piston machines or pumps (such pumps specially adapted for elastic fluids F04C21/00)

Oscillating-piston machines or pumps (such pumps specially adapted for elastic fluids F04C21/00) · 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	F04C9/00
Official title	Oscillating-piston machines or pumps (such pumps specially adapted for elastic fluids F04C21/00)
Display label	Oscillating-piston machines or pumps (such pumps specially adapted for elastic fluids F04C21/00)
Total patents	11

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

Filing activity over the last five years is stable.

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