Method for producing a green paper for producing a gas diffusion layer for a fuel cell
US-2023411632-A1 · Dec 21, 2023 · US
This page is not indexed by search engines while we improve data quality.
Watermarking devices
Watermarking devices · Cooperative Patent Classification (CPC)
Textile and paper production, treatment, and products.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | D21F1/44 |
| Official title | Watermarking devices |
| Display label | Watermarking devices |
| Total patents | 11 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 3 |
| 2020 | 3 |
| 2022 | 1 |
| 2023 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Green paper for producing a gas diffusion layer for a fuel cell
US-2023317973-A1 · Oct 5, 2023 · US
Method for producing a green paper for producing a gas diffusion layer for a fuel cell
US-2023317974-A1 · Oct 5, 2023 · US
Device for generating a pattern on a clothing for a machine for manufacturing a web material
US-11465405-B2 · Oct 11, 2022 · US
Device for generating a pattern on a clothing for a machine for manufacturing a web material
US-2020173107-A1 · Jun 4, 2020 · US
Watermarking
US-10632780-B2 · Apr 28, 2020 · US
Device for generating a pattern on a clothing for a machine for manufacturing a web material
US-2020087858-A9 · Mar 19, 2020 · US
Device for generating a pattern on a clothing for a machine for manufacturing a web material
US-2017321377-A1 · Nov 9, 2017 · US
Watermarking
US-2017239973-A1 · Aug 24, 2017 · US
Electrotype for forming an image during a paper making process
US-9739014-B2 · Aug 22, 2017 · US
Device and method for generating a pattern on a clothing for a machine for manufacturing a web material, and clothing
US-2016060811-A1 · Mar 3, 2016 · US