Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10538068 | Method for producing functional-substance thin film material, functional-substance thin film material, and laminate thereof | Takeshi Chakihara, Shuichi Iwanaga, Hideyuki Yamamoto, Yoshinari Yasui | 2020-01-21 |
| 6139329 | Karaoke system and contents storage medium therefor | Masao Toyosawa | 2000-10-31 |
| 6077084 | Karaoke system and contents storage medium therefor | Masao Toyosawa | 2000-06-20 |
| 5980261 | Karaoke system having host apparatus with customer records | Masao Toyosawa | 1999-11-09 |
| 5956459 | Karaoke apparatus having video mixer of main and insert pictures | Hirokazu Kato, Minoru Ogita | 1999-09-21 |
| 5900566 | Karaoke playback apparatus utilizing digital multi-channel broadcasting | Masao Toyosawa | 1999-05-04 |
| 5857171 | Karaoke apparatus using frequency of actual singing voice to synthesize harmony voice from stored voice information | Yasuo Kageyama | 1999-01-05 |
| 5587546 | Karaoke apparatus having extendible and fixed libraries of song data files | Hirokazu Kato | 1996-12-24 |