Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6582235 | Method and apparatus for displaying music piece data such as lyrics and chord data | Masahiko Wakita | 2003-06-24 |
| 6572381 | Computer system and karaoke system | — | 2003-06-03 |
| 6504090 | Apparatus and method for practice and evaluation of musical performance of chords | Masahiko Wakita | 2003-01-07 |
| 6355870 | Apparatus and method for reproduction of tune data | Shigehiko Mizuno | 2002-03-12 |
| 6352432 | Karaoke apparatus | Kanehisa Tsurumi, Satoshi Tachibana | 2002-03-05 |
| 6346666 | Apparatus and method for practice and evaluation of musical performance of chords | Masahiko Wakita | 2002-02-12 |
| 6231347 | Computer system and karaoke system | — | 2001-05-15 |
| 6206704 | Karaoke network system with commercial message selection system | — | 2001-03-27 |
| 5947746 | Karaoke network system with commercial message selection system | — | 1999-09-07 |