Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6810390 | System and method for verifying digital postal marks | Cheryl L. Picoult, Leon A. Pintsov, Frederick W. Ryan, Jr. | 2004-10-26 |
| 6363357 | Method and apparatus for providing authorization to make multiple copies of copyright protected products purchased in an online commercial transaction | Frederick W. Ryan, Jr. | 2002-03-26 |
| 5884158 | Cellular telephone authentication system using a digital certificate | Frederick W. Ryan, Jr. | 1999-03-16 |
| 5812945 | Metered payment cellular telephone communication system | Gary G. Hansen, David W. Riley, David K. Lee, Frederick W. Ryan, Jr., Anthony F. Violante +1 more | 1998-09-22 |