Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5239907 | Muting device of grand piano | Nobuo Sugiyama, Yasutoshi Kaneko | 1993-08-31 |
KI
Katuo Ito
Overall (All Time): #3,831,796 of 4,157,543Top 95%
1
Patents All Time