What is CPC H04R9/047?

CPC H04R9/047 is the Cooperative Patent Classification code for “in which the windings of the moving coil lay in the same plane.”

How many patents are filed under CPC H04R9/047 (in which the windings of the moving coil lay in the same plane)?

Our database includes 153 publications tagged with this CPC code.

Publication counts under this code: 18 in 2024 vs 18 in 2025 (latest complete years).

in which the windings of the moving coil lay in the same plane · Cooperative Patent Classification (CPC)

Electric circuits, power, telecommunications, and semiconductors.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	H04R9/047
Official title	{in which the windings of the moving coil lay in the same plane}
Display label	in which the windings of the moving coil lay in the same plane
Total patents	153

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 H04R9/047?: CPC H04R9/047 is the Cooperative Patent Classification code for “in which the windings of the moving coil lay in the same plane.”
How many patents are filed under CPC H04R9/047 (in which the windings of the moving coil lay in the same plane)?: Our database includes 153 publications tagged with this CPC code.
Is patent activity under CPC H04R9/047 growing?: Publication counts under this code: 18 in 2024 vs 18 in 2025 (latest complete years).