Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5406627 | Digital data cryptographic system | John R. Thompson, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller | 1995-04-11 |
| 5267312 | Audio signal cryptographic system | John R. Thompson, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller | 1993-11-30 |
| 5185794 | System and method for scrambling and/or descrambling a video signal | John R. Thompson, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller | 1993-02-09 |
| 5166976 | System and method for detection of a pulse within a video signal | John R. Thompson, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller | 1992-11-24 |
| 5091938 | System and method for transmitting entertainment information to authorized ones of plural receivers | John R. Thompson, William L. Phipps, Steven J. Raynesford, Philip H. Rittmueller | 1992-02-25 |