Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6730839 | Silent system with split hammer stopper and keyboard musical instrument having the same | — | 2004-05-04 |
| 6407321 | Jig for aligning shutter with photo couplers and key and assembling method using the same | Takashi Tamaki | 2002-06-18 |
| 6265647 | Keyboard musical instrument having hammer stopper changed between free position and blocking position through turn on horizontal plane | Takashi Tamaki | 2001-07-24 |
| 6194649 | Keyboard musical instrument equipped with partially repaireable change-over mechanism for changing hammer stopper | Takashi Tamaki | 2001-02-27 |