Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10810984 | Fingering display device and fingering display program | — | 2020-10-20 |
| 9640161 | Musical score displaying and performing program, and musical score displaying and performing device | — | 2017-05-02 |
| 8744136 | Sound reproduction method and device | — | 2014-06-03 |
| 8536437 | Musical score playing device and musical score playing program | — | 2013-09-17 |
| 7663044 | Musical performance self-training apparatus | — | 2010-02-16 |
| 7525035 | Musical performance self-training apparatus | — | 2009-04-28 |
| 5131308 | Keyboard device of electronic keyboard musical instrument | — | 1992-07-21 |
| 5081895 | Keyboard | — | 1992-01-21 |
| 5070218 | Key guide apparatus for electronic musical instrument | — | 1991-12-03 |
| 4890533 | Key device for electronic keyboard musical instrument | Tsutomu Yamaguchi, Yutaka Tamai, Norizo Kamimura | 1990-01-02 |
| 4856407 | Action mechanism for a keyboard of an electronic piano | Tsutomu Yamaguchi | 1989-08-15 |