Process for manufacturing a functional flexible cellulosic substrate, setup for implementing said process
US-2020305278-A1 · Sep 24, 2020 · US
Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00)
Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00) · 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 | D21H21/40 |
| Official title | Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00) |
| Display label | Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00) |
| Total patents | 85 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 10 |
| 2017 | 15 |
| 2018 | 12 |
| 2019 | 9 |
| 2020 | 10 |
| 2021 | 8 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Watermarked paper
US-10737525-B2 · Aug 11, 2020 · US
Shaped objects for use in security applications
US-2020217017-A1 · Jul 9, 2020 · US
Sheet manufacturing apparatus, recording sheet, and sheet manufacturing method
US-2020190743-A1 · Jun 18, 2020 · US
Creation of a transparent polymer window with a field of lenses in a security paper substrate
US-10654256-B2 · May 19, 2020 · US
Printing paper without ink
US-10639920-B2 · May 5, 2020 · US
Watermarking
US-10632780-B2 · Apr 28, 2020 · US
Ultra-High Resolution Conductive Traces Flexible Biocomposites by Resist Stenciling
US-2020096869-A1 · Mar 26, 2020 · US
Method for Preparing Large-area Structural Chromogenic Pattern by Ink-jet Printing and Anti-counterfeiting Method Based on Structural Color Change
US-2020010703-A1 · Jan 9, 2020 · US
Optically variable security devices
US-2019346596-A1 · Nov 14, 2019 · US
Security paper based on RF tag using dipole array structure and method for manufacturing the security paper
US-10468745-B2 · Nov 5, 2019 · US
Volume hologram sheet to be embedded, forgery prevention paper, and card
US-2019232709-A1 · Aug 1, 2019 · US
Method for marking a feature substance, security feature, document of value and method for verifying said document
US-10363767-B2 · Jul 30, 2019 · US
Creation of a transparent window in a security substrate for security printing applications
US-10350840-B2 · Jul 16, 2019 · US
Roll-shaped paper and printer
US-2019118570-A1 · Apr 25, 2019 · US
Electrically conductive, colored interference pigments
US-10266699-B2 · Apr 23, 2019 · US
Security element for a security document and process for the production thereof
US-10259252-B2 · Apr 16, 2019 · US
Non-metallic pigments having metal properties
US-10240045-B2 · Mar 26, 2019 · US
Method of tagging a substrate
US-2018340298-A1 · Nov 29, 2018 · US
Security pigment, luminescent polymer resin and method for producing same
US-2018320015-A1 · Nov 8, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21H21/40?
- CPC D21H21/40 is the Cooperative Patent Classification code for “Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00).”
- How many patents are filed under CPC D21H21/40 (Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00))?
- Our database includes 85 publications tagged with this CPC code.
- Is patent activity under CPC D21H21/40 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).