Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6912210 | Data communication system and communication device used | Yoshiyuki Karakawa | 2005-06-28 |
| 5596623 | Testing and complaint accepting communication unit | Yuji Kuroki | 1997-01-21 |