Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7251253 | Audio packet communications system, network telephone terminal and special packet process method | Takeshi Makita | 2007-07-31 |
| 6876732 | Service providing method for electronic device, customer center, and user system | Yoshimitsu Ebisawa, Seiichi Yamamoto, Hitoshi Kato, Yoshihiro Kawauchi, Takeshi Makita | 2005-04-05 |
| 6570976 | Multimedia private branch exchanger and private branch exchange system | Hiroshi Asada | 2003-05-27 |
| 4893331 | System allowing selective connection of various types of external apparatuses to telephone set | Takeshi Horiuchi, Yasuji Sato | 1990-01-09 |