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with vanes hinged to the inner member and reciprocating with respect to the inner member

with vanes hinged to the inner member and reciprocating with respect to the inner member · 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	F04C2/321
Official title	{with vanes hinged to the inner member and reciprocating with respect to the inner member}
Display label	with vanes hinged to the inner member and reciprocating with respect to the inner member
Total patents	9

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.