Issued Patents 1997
Showing 1–2 of 2 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 |