Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10657930 | Topboard reflection preventer for grand piano | — | 2020-05-19 |
| 9765166 | Crosslinkable polymer | Mitsuo Shibutani, Masahiro Saito, Bernhard Seiferling, Jiro Tsuchiya, Yasuo Matsuzawa | 2017-09-19 |
| 6506966 | Erroneous opening prevention mechanism for a grand piano lid | — | 2003-01-14 |
| 4961361 | Tuning pin | Fujio Yamagishi | 1990-10-09 |