Issued Patents All Time
Showing 51–71 of 71 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7508944 | Using classification techniques in digital watermarking | — | 2009-03-24 |
| 7454033 | Quantization-based data hiding employing calibration and locally adaptive quantization | John Stach, Ravi K. Sharma | 2008-11-18 |
| 7289643 | Method, apparatus and programs for generating and utilizing content signatures | Kenneth L. Levy | 2007-10-30 |
| 7286685 | Halftone watermarking and related applications | Claude Zeller | 2007-10-23 |
| 7277468 | Measuring quality of service of broadcast multimedia signals using digital watermark analyses | Jun Tian, Kenneth L. Levy | 2007-10-02 |
| 7246239 | Digital watermarks for checking authenticity of printed objects | Tony F. Rodriguez, Mark Haynes, Geoffrey B. Rhoads | 2007-07-17 |
| 7054461 | Authenticating printed objects using digital watermarks associated with multidimensional quality metrics | Claude Zeller, Donald G. Mackay, William Kilmartin, Robert A. Cordery, William A. Brosseau +2 more | 2006-05-30 |
| 7020349 | Halftone watermarking and related applications | — | 2006-03-28 |
| 6993149 | Embedding digital watermarks in spot colors | Osama M. Alattar | 2006-01-31 |
| 6993154 | Measuring digital watermark strength using error correction coding metrics | — | 2006-01-31 |
| 6882737 | Digitally watermarking holograms for identity documents | Neil E. Lofgren, Stephen K. Decker, J. Scott Carr | 2005-04-19 |
| 6782115 | Watermark holograms | Stephen K. Decker, J. Scott Carr, Geoffrey B. Rhoads | 2004-08-24 |
| 6760464 | Halftone watermarking and related applications | — | 2004-07-06 |
| 6694041 | Halftone watermarking and related applications | — | 2004-02-17 |
| 6683966 | Watermarking recursive hashes into frequency domain regions | Jun Tian, Stephen K. Decker | 2004-01-27 |
| 6608911 | Digitally watermaking holograms for use with smart cards | Neil E. Lofgren, Stephen K. Decker, J. Scott Carr | 2003-08-19 |
| 6580809 | Quantization-based data hiding employing calibration and locally adaptive quantization | John Stach, Ravi K. Sharma | 2003-06-17 |
| 6546116 | Adjusting an electronic camera to acquire an image | Eliot Rogers, Brett T. Hannigan | 2003-04-08 |
| 6533385 | Method for determining a printer's signature and the number of dots per inch printed in a document to provide proof that the printer printed a particular document | Donald G. Mackay, Claude Zeller, Robert A. Cordery | 2003-03-18 |
| 6483927 | Synchronizing readers of hidden auxiliary data in quantization-based data hiding schemes | Ravi K. Sharma | 2002-11-19 |
| 6366680 | Adjusting an electronic camera to acquire a watermarked image | Eliot Rogers, Brett T. Hannigan | 2002-04-02 |