Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5299484 | Bearing structure and transmission structure in piano | Muneo Ishida, Mituo Yamashita, Masahiro Tanaka | 1994-04-05 |
| 5223652 | Key and keyboard | Muneo Ishida, Mituo Yamashita, Masahiro Tanaka | 1993-06-29 |
| 4840104 | Keyboard | Muneo Ishida, Mithuo Yamashita, Masahiro Tanaka | 1989-06-20 |