Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6912634 | Verifying the integrity of a media key block by storing validation data in a validation area of media | Jeffrey Bruce Lotspiech, Atsushi Ishihara, Taku Kato, Yoshihisa Fukushima | 2005-06-28 |