Issued Patents All Time
Showing 25 most recent of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10032211 | Anonymous electronic transactions | Robert Sullivan | 2018-07-24 |
| 8417216 | Anonymous electronic transactions | Robert Sullivan | 2013-04-09 |
| 7434261 | System and method of identifying the source of an attack on a computer network | Mihai Costea | 2008-10-07 |
| 7242921 | Anonymous electronic transactions | Rob Sullivan | 2007-07-10 |
| 7054479 | Segmenting three-dimensional video images using stereo | David A. Romrell | 2006-05-30 |
| 6873723 | Segmenting three-dimensional video images using stereo | David A. Romrell | 2005-03-29 |
| 6542610 | Content protection for digital transmission systems | Chandler Brendan Stanton Traw | 2003-04-01 |
| 6532194 | Method and apparatus for providing certified time | — | 2003-03-11 |
| 6253323 | Object-based digital signatures | George W. Cox, Paul E. Onnen | 2001-06-26 |
| 6243793 | Protocol for arbitrating access to a shared memory area using historical state information | Robert Knauerhase, James C. Stanley | 2001-06-05 |
| 6205550 | Tamper resistant methods and apparatus | Joseph M. Nardone, Richard P. Mangold, Jody L. Pfotenhauer, Keith L. Shippy, Richard L. Maliszewski +1 more | 2001-03-20 |
| 6178509 | Tamper resistant methods and apparatus | Joseph M. Nardone, Richard Mangold, Jody L. Pfotenhauer, Keith L. Shippy, Richard L. Maliszewski +1 more | 2001-01-23 |
| 6175925 | Tamper resistant player for scrambled contents | Joseph M. Nardone, Richard P. Mangold, Jody L. Pfotenhauer, Keith L. Shippy, Richard L. Maliszewski +1 more | 2001-01-16 |
| 6175626 | Digital certificates containing multimedia data extensions | George W. Cox, Paul E. Onnen | 2001-01-16 |
| 6148407 | Method and apparatus for producing computer platform fingerprints | — | 2000-11-14 |
| 6134551 | Method of caching digital certificate revocation lists | — | 2000-10-17 |
| 6069647 | Conditional access and content security method | Robert Sullivan, John M. Acken | 2000-05-30 |
| 6041122 | Method and apparatus for hiding crytographic keys utilizing autocorrelation timing encoding and computation | Gary L. Graunke | 2000-03-21 |
| 5991403 | Recoverable cryptographic transformation on YUV data suitable for compressions | Joseph M. Nardone, Robert Sullivan | 1999-11-23 |
| 5949877 | Content protection for transmission systems | Chandler Brendan Stanton Traw | 1999-09-07 |
| 5940513 | Parameterized hash functions for access control | Robert Knauerhase | 1999-08-17 |
| 5936226 | Mass storage device adapter for smart cards | — | 1999-08-10 |
| 5933502 | Method and apparatus for enhancing the integrity of visual authentication | Raymond J. Werner | 1999-08-03 |
| 5915018 | Key management system for DVD copyright management | — | 1999-06-22 |
| 5892899 | Tamper resistant methods and apparatus | Gary L. Graunke | 1999-04-06 |