Differential modulation with several bits {, e.g. differential pulse code modulation [DPCM] (H03M3/30 takes precedence)}

Differential modulation with several bits {, e.g. differential pulse code modulation [DPCM] (H03M3/30 takes precedence)} · Cooperative Patent Classification (CPC)

Electric circuits, power, telecommunications, and semiconductors.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeH03M3/04
Official titleDifferential modulation with several bits {, e.g. differential pulse code modulation [DPCM] (H03M3/30 takes precedence)}
Display labelDifferential modulation with several bits {, e.g. differential pulse code modulation [DPCM] (H03M3/30 takes precedence)}
Total patents61

Filing trend

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

Filing activity over the last five years is stable.

Patents filed per year
YearPatents
20162
20176
20186
20196
20204
20215
202215
20234
20247
20255
20261

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 H03M3/04?
CPC H03M3/04 is the Cooperative Patent Classification code for “Differential modulation with several bits {, e.g. differential pulse code modulation [DPCM] (H03M3/30 takes precedence)}.”
How many patents are filed under CPC H03M3/04 (Differential modulation with several bits {, e.g. differential pulse code modulation [DPCM] (H03M3/30 takes precedence)})?
Our database includes 61 publications tagged with this CPC code.
Is patent activity under CPC H03M3/04 growing?
Publication counts under this code: 7 in 2024 vs 5 in 2025 (latest complete years).