Associating two or more layers

Associating two or more layers · Cooperative Patent Classification (CPC)

Separating, mixing, shaping, printing, and transporting materials.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeB42D25/45
Official titleAssociating two or more layers
Display labelAssociating two or more layers
Total patents447

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
201528
201633
201723
201857
201967
202058
202156
202231
202326
202436
202525
20267

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 B42D25/45?
CPC B42D25/45 is the Cooperative Patent Classification code for “Associating two or more layers.”
How many patents are filed under CPC B42D25/45 (Associating two or more layers)?
Our database includes 447 publications tagged with this CPC code.
Is patent activity under CPC B42D25/45 growing?
Publication counts under this code: 36 in 2024 vs 25 in 2025 (latest complete years).