Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7335833 | Music performance system | David E. Smith, Kojiro Umezaki | 2008-02-26 |
| 6696631 | Music performance system | David E. Smith, Kojiro Umezaki | 2004-02-24 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7335833 | Music performance system | David E. Smith, Kojiro Umezaki | 2008-02-26 |
| 6696631 | Music performance system | David E. Smith, Kojiro Umezaki | 2004-02-24 |