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propelled by a spring under tension

propelled by a spring under tension · Cooperative Patent Classification (CPC)

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

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CPC classification statistics
Metric	Value
CPC code	F41A19/29
Official title	propelled by a spring under tension
Display label	propelled by a spring under tension
Total patents	4

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

Filing activity appears stable based on the most recent years.

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