Issued Patents All Time
Showing 101–106 of 106 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5910987 | Systems and methods for secure transaction management and electronic rights protection | Karl Ginter, Francis J. Spahn, David M. Van Wie | 1999-06-08 |
| 5892900 | Systems and methods for secure transaction management and electronic rights protection | Karl Ginter, W. Olin Sibert, Francis J. Spahn, David M. Van Wie | 1999-04-06 |
| 5410598 | Database usage metering and protection system and method | — | 1995-04-25 |
| 5050213 | Database usage metering and protection system and method | — | 1991-09-17 |
| 4977594 | Database usage metering and protection system and method | — | 1990-12-11 |
| 4827508 | Database usage metering and protection system and method | — | 1989-05-02 |