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using a gas piston arranged concentrically around the barrel

using a gas piston arranged concentrically around the barrel · Cooperative Patent Classification (CPC)

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

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Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	F41A5/20
Official title	using a gas piston arranged concentrically around the barrel
Display label	using a gas piston arranged concentrically around the barrel
Total patents	10

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

Filing activity over the last five years is declining.

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