Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8654981 | System and method for conditional access key encryption | Stephen G. Perlman | 2014-02-18 |
| 7543323 | Retrieving content using batch mode and real-time logical addresses | Daniel J. Zigmond, Dean J. Blackketter, Phillip Y. Goldman | 2009-06-02 |
| 7463737 | System and method for conditional access key encryption | Stephen G. Perlman | 2008-12-09 |
| 6400407 | Communicating logical addresses of resources in a data service channel of a video signal | Daniel J. Zigmond, Dean J. Blackketter, Phillip Y. Goldman | 2002-06-04 |