Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5913257 | Method of manufacturing guitar strings, and guitar strings resulting from such method | Helmut F. K. Schaller | 1999-06-15 |
| 5783763 | Bi-directional vibrato mechanism for a guitar | Helmut F. K. Schaller | 1998-07-21 |
| 5522298 | Tremolo arm stabilizer for electric guitar | Helmut F. K. Schaller | 1996-06-04 |
| 4748889 | Machine head | — | 1988-06-07 |