What is CPC F16D3/30?

CPC F16D3/30 is the Cooperative Patent Classification code for “in which the coupling is specially adapted to constant velocity-ratio.”

How many patents are filed under CPC F16D3/30 (in which the coupling is specially adapted to constant velocity-ratio)?

Our database includes 71 publications tagged with this CPC code.

Publication counts under this code: 3 in 2024 vs 4 in 2025 (latest complete years).

in which the coupling is specially adapted to constant velocity-ratio · Cooperative Patent Classification (CPC)

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

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	F16D3/30
Official title	in which the coupling is specially adapted to constant velocity-ratio
Display label	in which the coupling is specially adapted to constant velocity-ratio
Total patents	71

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

Filing activity over the last five years is rapidly declining.

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

Answers are generated from the same data shown on this page.

What is CPC F16D3/30?: CPC F16D3/30 is the Cooperative Patent Classification code for “in which the coupling is specially adapted to constant velocity-ratio.”
How many patents are filed under CPC F16D3/30 (in which the coupling is specially adapted to constant velocity-ratio)?: Our database includes 71 publications tagged with this CPC code.
Is patent activity under CPC F16D3/30 growing?: Publication counts under this code: 3 in 2024 vs 4 in 2025 (latest complete years).