Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7778195 | Network, server apparatus, IP corresponding terminal device, and speech-quality control method used in the same | Takanori Hiroshima | 2010-08-17 |
| 7496089 | Network, private branch exchange, and PBX additional service starting method | Takanori Hiroshima | 2009-02-24 |
| 6571108 | Private branch mobile communication system and method | Kiyokazu Otsuka | 2003-05-27 |
| 6370393 | Private branch exchange | Kiyokazu Otsuka | 2002-04-09 |