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Air-ducts or air channels {(heating in general F24; ventilating rooms in general F24F)}

Air-ducts or air channels {(heating in general F24; ventilating rooms in general F24F)} · Cooperative Patent Classification (CPC)

Building, mining, and civil engineering structures.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	E04F17/04
Official title	Air-ducts or air channels {(heating in general F24; ventilating rooms in general F24F)}
Display label	Air-ducts or air channels {(heating in general F24; ventilating rooms in general F24F)}
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.