Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6735615 | Status change notification system for use in chat system channel | Kenichi Sasaki, Tatsuro Matsumoto, Hitoshi Yamauchi, Hidenobu Ito, Kazuki Matsui | 2004-05-11 |
| 6678720 | Chat system and method for delivering additional information via another independent network | Tatsuro Matsumoto | 2004-01-13 |