Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5638443 | System for controlling the distribution and use of composite digital works | Mark J. Stefik, Daniel G. Bobrow | 1997-06-10 |
| 5634012 | System for controlling the distribution and use of digital works having a fee reporting mechanism | Mark J. Stefik, Ralph C. Merkle | 1997-05-27 |