Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7043194 | Learning system | Yasuyuki Ikegami, Kazuhiro Sumi | 2006-05-09 |
| 6865368 | System and method for producing educational material | Yasuyuki Ikegami, Kazuhiro Sumi | 2005-03-08 |
| 6315646 | Processing system for increasing the quality of a gear and a barreling apparatus usable in the same | — | 2001-11-13 |