EPFL is financed by the Swiss government. Its research results
should be made available in as many fields as possible.
EPFL therefore aims at granting non-exclusive licenses
to companies interested in its
intellectual property.
In case of interest for the patents below,
contact Prof. R.D. Hersch.
Synthesis of authenticable luminescent color halftone images
- R.D. Hersch, R. Rossier
U.S. Patent No. 8355169
Abstract
Full paper: Full Text
- Printing color images visible under UV light on security documents and
valuable articles
- R.D. Hersch; P.Donzé; S. Chosson
U.S. Patent No. 8085438
Abstract
Full paper: Full Text
- Synthesis of superposition images for watches, valuable articles and publicity
- R.D. Hersch; S. Chosson
U.S. Patent No. 7,295,717
Abstract
Full paper: Full Text
- Authentication of secure items by shape level lines
- S. Chosson; R.D. Hersch
U.S. Patent No. 7,305,105
Abstract
Full paper: Full Text
- Model-based synthesis of band moire images for authenticating security
documents and valuable products
- R.D. Hersch; S. Chosson
U.S. Patent No. 7,751,608
Abstract
Full paper: Full Text
- Authentication of documents and articles by moire patterns
- R.D. Hersch; S. Chosson
U.S. Patent No. 7,194,105
Abstract
Full paper: Full Text
- Authentication with built-in encryption by using moire intensity profiles between random layers
- I.Amidror
U.S. Patent No. 7,058,202
Abstract
Full paper: Full Text
- Method and Apparatus for Generating Digital Halftone Images by Using Multi Color Dithering
- V. Ostromoukhov, R.D. Hersch
U.S. Patent No. 7,054,038
Abstract
Full paper: Full Text
- Images incorporating microstructures
- R.D.Hersch et al.
U.S. Patent No. 7,027,660
Abstract
Full paper: Full Text
- Authentication of documents and valuable particles by using moire intensity profiles
- I.Amidror, R.D.Hersch
U.S. Patent No. 6,819,775
Abstract
Full paper: Full Text
- Method and apparatus for authentication of documents by using the intensity profile of moire patterns
- Isaac Amidror, Roger D. Hersch
U.S. Patent No. 6,249,588
Abstract
Full paper: Full Text
- Method and apparatus for generating halftone images by evolutionary screen dot contours
- V.Ostromoukhov, R.D.Hersch
U.S. Patent No. 6,198,545
Abstract
Full paper: Full Text
- Methods and apparatus for authentication of documents by using the intensity profile of moire patterns
- Isaac Amidror, Roger D. Hersch
U.S. Patent No. 5,995,638
Abstract
Full paper: Full Text
- Method for generating a security document
- Roger D. Hersch; Nicolas Rudaz
E.P. 1073257A1
Abstract
Full paper: Full Text
- Method for producing contrast-controlled grayscale characters
- Roger D. Hersch, Claude Bétrisey, Justin Bur
U.S. Patent No. 5,796,409
Abstract
Full paper: Full Text
- Method for producing visually evenly spaced typographic characters
- Roger D. Hersch, Claude Bétrisey
U.S. Patent No. 5,768,490
Abstract
Full paper: Full Text
- Method and apparatus for a parallel data storage and processing server
- Roger D. Hersch, Bernard Krummenacher
U.S. Patent No. 5,737,549
Abstract
Full paper: Full Text
- Method and Apparatus for Generating Digital Half-tone Images Using a Rotated Dispersed Dither Matrix.
- Victor Ostromoukhov
U.S. Patent No. 5,438,431
Abstract
Full paper: Full Text
- Method and Apparatus for Generating Halftone Images by Discrete One-to-one Dither Tile Rotation
- V.Ostromoukhov, R.D.Hersch
U.S. Patent No. 5,422,742
Abstract
Full paper: Full Text
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