Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6389403 | Method and apparatus for uniquely identifying a customer purchase in an electronic distribution system | — | 2002-05-14 |
| 6389538 | System for tracking end-user electronic content usage | George Gregory Gruse, Kenneth L. Milsted | 2002-05-14 |