Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6091721 | Apparatus for telephone communication over plural channels | Philip L. Young | 2000-07-18 |
| 5589944 | Method and apparatus for generating a video signal producing an unviewable display from a videotape recording thereof | Philip L. Young | 1996-12-31 |
| 5585929 | Method and apparatus for modifying a video signal to inhibit unauthorized videotape recording and subsequent reproduction thereof | Philip L. Young | 1996-12-17 |
| 5251041 | Method and apparatus for modifying a video signal to inhibit unauthorized videotape recording and subsequent reproduction thereof | Philip L. Young | 1993-10-05 |