Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6836549 | Method and apparatus for synthesizing and reducing the effects of video copy protection signals | Ronald Quan | 2004-12-28 |
| 6600873 | Method and apparatus for detecting modified color burst signals to prevent the copying of a video program | John O. Ryan | 2003-07-29 |
| 6091822 | Method and apparatus for recording scrambled video audio signals and playing back said video signal, descrambled, within a secure environment | Andrew Mellows, John O. Ryan, William J. Wrobleski, Ronald Quan | 2000-07-18 |
| 4532553 | Continuous depth of focus control | — | 1985-07-30 |
| 4309723 | Apparatus and method for registration and shading of color television cameras | John O. Ryan, Joseph L. Corkery, Edward P. Sudyka, Anne M. Reagan, James R. Holzgrafe | 1982-01-05 |