Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8283539 | Musical instrument string with hyper elliptical wound cover wire | — | 2012-10-09 |
| 6465721 | Musical instrument string with auto wound cover wire | Donald A. Dykstra | 2002-10-15 |
| 6265651 | Gauge for selecting musical instrument strings | — | 2001-07-24 |
| 6256872 | Guitar string manufacturing auto start winding process | Donald A. Dykstra | 2001-07-10 |