Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4297936 | Retractable fret system for stringed instruments | — | 1981-11-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4297936 | Retractable fret system for stringed instruments | — | 1981-11-03 |