Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8813113 | Method and system for adding a conditional access system | David J. Duffield, Jean-Louis Diascorn | 2014-08-19 |
| 8332657 | Global copy protection system for digital home networks | David Emery Virag, David J. Duffield, Michael Scott Deiss, Billy Wesley Beyers, Jr. | 2012-12-11 |
| 8098820 | Conditional access system for broadcast digital television | William Wesley Beyers, Izzat H. Izzat, Edwin Arturo Heredia, Yousef Wasef Nijim | 2012-01-17 |
| 7664268 | Conditional access system for digital receivers | Mehmet Ozkan, Billy Wesley Beyers, Jr. | 2010-02-16 |
| 7636846 | Global conditional access system for broadcast services | — | 2009-12-22 |
| 7492897 | Conditional access system for broadcast digital television | William Wesley Beyers, Izzat H. Izzat, Edwin Arturo Heredia, Yousef Wasef Nijim | 2009-02-17 |
| 7254236 | Method and system for handling two CA systems in a same receiver | Michael Scott Deiss, Jean-Louis Diascorn, David J. Duffield | 2007-08-07 |
| 7224806 | Threshold cryptography scheme for conditional access systems | — | 2007-05-29 |
| 7200752 | Threshold cryptography scheme for message authentication systems | — | 2007-04-03 |
| 7039802 | Conditional access system for set-top boxes | Keith Reynolds Wehmeyer, David Emery Virag | 2006-05-02 |
| 6409089 | Method for protecting the audio/visual data across the NRSS interface | — | 2002-06-25 |