Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7385131 | Method and apparatus of music obfuscation to limit unauthorized playback | — | 2008-06-10 |
| 5905220 | Method and apparatus for sensing pedal motion and actuating pedals in player pianos | Charles R. Lee, Alana J. Yorba | 1999-05-18 |
| 5841050 | Method and apparatus for optically determining note characteristics from key motion in a keyboard operated musical instrument | Charles R. Lee | 1998-11-24 |
| 5834669 | Method and apparatus for optically determining note characteristics from hammer catchers in a keyboard operated musical instrument | Charles R. Lee | 1998-11-10 |
| 5524521 | Method and apparatus for optically determining note characteristics in a keyboard operated musical instrument | Charles R. Lee | 1996-06-11 |