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characterised by the provision of coaxial valves; characterised by the provision of valves co-operating with both intake and exhaust ports

characterised by the provision of coaxial valves; characterised by the provision of valves co-operating with both intake and exhaust ports · Cooperative Patent Classification (CPC)

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

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeF01L1/28
Official titlecharacterised by the provision of coaxial valves; characterised by the provision of valves co-operating with both intake and exhaust ports
Display labelcharacterised by the provision of coaxial valves; characterised by the provision of valves co-operating with both intake and exhaust ports
Total patents11

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
20162
20181
20191
20206
20211

Representative patents

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