Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7723597 | 3-dimensional musical keyboard | Paul DeRocco | 2010-05-25 |
| 4665788 | Keyboard apparatus | John S. Allan, F. Merrick Murphy | 1987-05-19 |
| 4498365 | Apparatus for providing extended versatility in a keyboard-controlled musical instrument in pitch variation, tone alteration characteristics and the like | John S. Allen, F. Merrick Murphy | 1985-02-12 |