Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4909122 | Portable device for prestressing and holding musical instrument strings | Michael Franke | 1990-03-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4909122 | Portable device for prestressing and holding musical instrument strings | Michael Franke | 1990-03-20 |