Issued Patents 2004
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6751656 | Apparatus and method for providing information about two-way computer communication services | Youji Kohda, Kenichi Sasaki, Ryuichi Matsukura, Yasuhide Matsumoto, Iwao Otsuka +3 more | 2004-06-15 |
| 6742116 | Security method, security software and security system for electronic communications | Tatsuro Matsumoto | 2004-05-25 |
| 6738807 | Virtual space communication system for executing communication among computers sharing a virtual space | Takashi Ohno, Akinori Iwakawa, Naohisa Kawaguchi | 2004-05-18 |
| 6735615 | Status change notification system for use in chat system channel | Noboru Iwayama, Kenichi Sasaki, Tatsuro Matsumoto, Hitoshi Yamauchi, Hidenobu Ito | 2004-05-11 |
| 6714965 | Group contacting system, and recording medium for storing computer instructions for executing operations of the contact system | Jun Kakuta, Hiroyasu Sugano | 2004-03-30 |
| 6711264 | Security improvement method and security system | Tatsuro Matsumoto | 2004-03-23 |