by controlling light sources, e.g. electroluminescent diodes {(G04G9/0058 takes precedence)}

by controlling light sources, e.g. electroluminescent diodes {(G04G9/0058 takes precedence)} · Cooperative Patent Classification (CPC)

Computing, optics, measurement, and control technologies.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeG04G9/04
Official titleby controlling light sources, e.g. electroluminescent diodes {(G04G9/0058 takes precedence)}
Display labelby controlling light sources, e.g. electroluminescent diodes {(G04G9/0058 takes precedence)}
Total patents46

Filing trend

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

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
20152
20165
20173
20184
20197
20208
20216
20225
20234
20241
20251

Representative patents

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

Frequently asked questions

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

What is CPC G04G9/04?
CPC G04G9/04 is the Cooperative Patent Classification code for “by controlling light sources, e.g. electroluminescent diodes {(G04G9/0058 takes precedence)}.”
How many patents are filed under CPC G04G9/04 (by controlling light sources, e.g. electroluminescent diodes {(G04G9/0058 takes precedence)})?
Our database includes 46 publications tagged with this CPC code.
Is patent activity under CPC G04G9/04 growing?
Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).