Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6925181 | Method of protecting high definition video signal | Leslie D. Kohn, David Barr | 2005-08-02 |
| 6570990 | Method of protecting high definition video signal | Leslie D. Kohn, David Barr | 2003-05-27 |
| 6122442 | Structure and method for motion estimation of a digital image by matching derived scores | Stephen C. Purcell | 2000-09-19 |
| 6071004 | Non-linear digital filters for interlaced video signals and method thereof | Stephen C. Purcell | 2000-06-06 |
| 5910909 | Non-linear digital filters for interlaced video signals and method thereof | Stephen C. Purcell | 1999-06-08 |
| 5630033 | Adaptic threshold filter and method thereof | Stephen C. Purcell | 1997-05-13 |
| 5598514 | Structure and method for a multistandard video encoder/decoder | Stephen C. Purcell, Subroto Bose | 1997-01-28 |
| 4897799 | Format independent visual communications | John D. Robbins | 1990-01-30 |