Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5259287 | Upright piano equipped with coupling units for horizontally supporting key bed | Hideo Yamashita, Hisao Mori | 1993-11-09 |
| 4661949 | Circuit for conference telephony | — | 1987-04-28 |
| 4641565 | Upright piano | Hiroki Tachida, Shigeaki Sato | 1987-02-10 |
| 4593594 | Housing for upright pianos | Hiroki Tachida, Shigeaki Sato | 1986-06-10 |