Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6730839 | Silent system with split hammer stopper and keyboard musical instrument having the same | — | 2004-05-04 |
KI
Katsuo Itou
Overall (2004): #182,303 of 270,089Top 70%
1
Patents 2004