Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D491551 | Interphone | Toshio Hotta | 2004-06-15 |
| D466882 | Interphone | Toshio Hotta | 2002-12-10 |
| D466883 | Interphone | Toshio Hotta | 2002-12-10 |
| D466491 | Interphone | Toshio Hotta | 2002-12-03 |
| D466099 | Interphone | Toshio Hotta | 2002-11-26 |
| D457866 | Interphone | Toshio Hotta | 2002-05-28 |