Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7596608 | Networked emergency management system | John S. Alexander | 2009-09-29 |
| 5567903 | Transducer assembly for a stringed musical instrument | Jonathan Coopersmith, Henry Madden | 1996-10-22 |
| 5408911 | Musical instrument string | Jonathan Grayson, Jonathan Coppersmith | 1995-04-25 |
| 5270475 | Electronic music system | Jonathan Grayson, Jonathan Coopersmith | 1993-12-14 |