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Two pistons coacting within one cylinder

Two pistons coacting within one cylinder · Cooperative Patent Classification (CPC)

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

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CPC classification statistics
Metric	Value
CPC code	F04B7/045
Official title	{Two pistons coacting within one cylinder}
Display label	Two pistons coacting within one cylinder
Total patents	5

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.