Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7408102 | Jack motion-restricting device for upright piano | — | 2008-08-05 |
| 6774294 | Key for musical instrument | Jun Ishii, Kenichi Ookubo | 2004-08-10 |
| 4958550 | Tuning method and apparatus for keyboard musical instrument | — | 1990-09-25 |