Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7162642 | Digital content distribution system and method | Robert Wilhelm Schumann, Richard Whittemore, David William Kravitz, Siu-Leong Iu, Guillaume Mercier +3 more | 2007-01-09 |
| 6738905 | Conditional access via secure logging with simplified key management | David William Kravitz | 2004-05-18 |