Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6645586 | Energy conversion composition | Yasuyuki Ohira | 2003-11-11 |
| 6635327 | Energy conversion composition | Yasuyuki Ohira | 2003-10-21 |
| 6515211 | Music performance assistance apparatus for indicating how to perform chord and computer program therefor | Satoru Umezawa | 2003-02-04 |