What is CPC B60K6/54?

CPC B60K6/54 is the Cooperative Patent Classification code for “Transmission for changing ratio.”

How many patents are filed under CPC B60K6/54 (Transmission for changing ratio)?

Our database includes 496 publications tagged with this CPC code.

Publication counts under this code: 24 in 2024 vs 23 in 2025 (latest complete years).

Transmission for changing ratio · Cooperative Patent Classification (CPC)

Separating, mixing, shaping, printing, and transporting materials.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	B60K6/54
Official title	Transmission for changing ratio
Display label	Transmission for changing ratio
Total patents	496

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.

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

What is CPC B60K6/54?: CPC B60K6/54 is the Cooperative Patent Classification code for “Transmission for changing ratio.”
How many patents are filed under CPC B60K6/54 (Transmission for changing ratio)?: Our database includes 496 publications tagged with this CPC code.
Is patent activity under CPC B60K6/54 growing?: Publication counts under this code: 24 in 2024 vs 23 in 2025 (latest complete years).