Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8301881 | Proactive forced renewal of content protection implementations | C. Brendan S. Traw | 2012-10-30 |
| 8121952 | System, method, and service for delivering multimedia content by means of a permission to decrypt titles on a physical media | Bradley Collar, Jeffrey Bruce Lotspiech, Florian Pestoni, Spencer Stephens | 2012-02-21 |
| 7958350 | Proactive forced renewal of content protection implementations | C. Brendan S. Traw | 2011-06-07 |
| 7845015 | Public key media key block | Carl M. Ellison, Brendan Traw, Gary L. Graunke | 2010-11-30 |
| 7725945 | Discouraging unauthorized redistribution of protected content by cryptographically binding the content to individual authorized recipients | Jeffrey Bruce Lotspiech | 2010-05-25 |
| 7392381 | Proactive forced renewal of content protection implementations | C. Brendan S. Traw | 2008-06-24 |
| 7305711 | Public key media key block | Carl M. Ellison, Brendan Traw, Gary L. Graunke | 2007-12-04 |
| 7305086 | Reducing problems caused by variations in watermark detection results | — | 2007-12-04 |
| 7111169 | Method and apparatus for content protection across a source-to-destination interface | Brendan Traw | 2006-09-19 |
| 7111175 | Method and apparatus for verifying the integrity of a media key block | — | 2006-09-19 |
| 7013010 | Method and apparatus for optimally formatting media key blocks stored on media with high transfer latencies | — | 2006-03-14 |
| 6957343 | Validating keying material by using a validation area of read-only media to prevent playback of unauthorized copies of content stored on the media | C. Brendan S. Traw | 2005-10-18 |
| 6738878 | Verifying the integrity of a media key block by storing validation data in the cutting area of media | Jeffrey Bruce Lotspiech, Atsushi Ishihara, Taku Kato, Yoshihisa Fukushima | 2004-05-18 |
| 6105117 | Source oriented data block relocation methodology and applications | — | 2000-08-15 |
| 5845297 | Disk block relocation de-optimization detection methodology and applications | Knut S. Grimsrud | 1998-12-01 |