Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6465721 | Musical instrument string with auto wound cover wire | Jeffrey E. Landtroop | 2002-10-15 |
| 6256872 | Guitar string manufacturing auto start winding process | Jeffrey E. Landtroop | 2001-07-10 |