Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6867354 | Tremolo unit for electric guitar | Shinjiro Hirayama | 2005-03-15 |
| 6593515 | Reinforcing structure for the neck portion of stringed instrument | Shinjiro Hirayama | 2003-07-15 |