Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8889975 | Keyboard apparatus | Akihiko Komatsu, Shigeru Muramatsu | 2014-11-18 |
| 8779256 | Keyboard apparatus | Shigeru Muramatsu | 2014-07-15 |
| 8648236 | Keyboard apparatus | Yoshinori Hayashi, Akihiko Komatsu, Shigeru Muramatsu | 2014-02-11 |
| 8558095 | Keyboard apparatus | Shigeru Muramatsu | 2013-10-15 |
| 8389833 | Upright piano type action | Shigeru Muramatsu | 2013-03-05 |
| 8294009 | Upright piano type action | Shigeru Muramatsu | 2012-10-23 |
| 8222509 | Pedal device of electronic keyboard musical instrument | Shigeru Muramatsu | 2012-07-17 |
| 7893334 | Pedal apparatus of electronic musical instrument | Toshiyuki Iwamoto, Shigeru Muramatsu | 2011-02-22 |