Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7705225 | Locking nut for guitar | Marcus L. Caldwell | 2010-04-27 |
| 7297851 | Guitar bridge apparatus | Marcus L. Caldwell | 2007-11-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7705225 | Locking nut for guitar | Marcus L. Caldwell | 2010-04-27 |
| 7297851 | Guitar bridge apparatus | Marcus L. Caldwell | 2007-11-20 |