Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus

Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus · 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 codeG03B27/72
Official titleControlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
Display labelControlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
Total patents26

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
20154
20164
20175
20186
20192
20202
20221
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 G03B27/72?
CPC G03B27/72 is the Cooperative Patent Classification code for “Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus.”
How many patents are filed under CPC G03B27/72 (Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus)?
Our database includes 26 publications tagged with this CPC code.
Is patent activity under CPC G03B27/72 growing?
Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).