Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5641929 | Apparatus for and method of generating musical tones | Seiji Okamoto, Katsushi Ishii, Yutaka Washiyama | 1997-06-24 |
| 5627334 | Apparatus for and method of generating musical tones | Yutaka Washiyama | 1997-05-06 |
| 5569870 | Keyboard electronic musical instrument having partial pedal effect circuitry | — | 1996-10-29 |
| 5550320 | Electronic sound generating device for generating musical sound by adding volume fluctuation to predetermined harmonics | — | 1996-08-27 |