Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8076563 | Keyboard device | — | 2011-12-13 |
| 6133518 | Composition of resin for light transmitting keys of a musical keyboard instrument | Iwao Tomita | 2000-10-17 |
| 4890533 | Key device for electronic keyboard musical instrument | Masanori Katsuta, Tsutomu Yamaguchi, Yutaka Tamai | 1990-01-02 |