What is CPC D04C3/38?

CPC D04C3/38 is the Cooperative Patent Classification code for “Driving-gear; Starting or stopping mechanisms.”

How many patents are filed under CPC D04C3/38 (Driving-gear; Starting or stopping mechanisms)?

Our database includes 34 publications tagged with this CPC code.

Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).

Driving-gear; Starting or stopping mechanisms · Cooperative Patent Classification (CPC)

Textile and paper production, treatment, and products.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	D04C3/38
Official title	Driving-gear; Starting or stopping mechanisms
Display label	Driving-gear; Starting or stopping mechanisms
Total patents	34

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

Filing activity over the last five years is growing.

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 D04C3/38?: CPC D04C3/38 is the Cooperative Patent Classification code for “Driving-gear; Starting or stopping mechanisms.”
How many patents are filed under CPC D04C3/38 (Driving-gear; Starting or stopping mechanisms)?: Our database includes 34 publications tagged with this CPC code.
Is patent activity under CPC D04C3/38 growing?: Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).