Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6317729 | Method for certifying delivery of secure electronic transactions | Marvin Sirbu | 2001-11-13 |
| 6076078 | Anonymous certified delivery | Justin D. Tygar, Michael Harkavy | 2000-06-13 |