Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7817787 | Voice mail apparatus and control method of voice mail apparatus | Akira Takahashi, Kazuharu Horiuchi, Hiroki Ida, Norimassa Niiya, Noriaki Ikeda +1 more | 2010-10-19 |
| 6731721 | Telephone exchange apparatus | Toshiaki Tanaka, Shuji Fujitsuka, Takashi Aoki | 2004-05-04 |
| 6687361 | Electronic exchange and key telephone system | Tamotsu Wakabayashi, Masashi Ishida, Katsunori Utsumi | 2004-02-03 |
| 6633631 | Digital key telephone system and extension terminal device thereof | Toshiaki Tanaka, Hiroshi Mano, Setsuo Kimura, Yoshihito Nagano, Masayuki Tsurusaki +4 more | 2003-10-14 |
| 6496576 | Digital key telephone system and extension terminal device thereof | Toshiaki Tanaka, Hiroshi Mano, Setsuo Kimura, Yoshihito Nagano, Masayuki Tsurusaki +4 more | 2002-12-17 |
| 6456705 | Digital key telephone system and extension terminal device thereof | Toshiaki Tanaka, Hiroshi Mano, Setsuo Kimura, Yoshihito Nagano, Masayuki Tsurusaki +4 more | 2002-09-24 |
| 6408060 | Digital key telephone system and extension terminal device thereof | Toshiaki Tanaka, Hiroshi Mano, Setsuo Kimura, Yoshihito Nagano, Masayuki Tsurusaki +4 more | 2002-06-18 |
| 6377671 | Digital key telephone system and extension terminal device thereof | Toshiaki Tanaka, Hiroshi Mano, Setsuo Kimura, Yoshihito Nagano, Masayuki Tsurusaki +4 more | 2002-04-23 |
| 6373924 | Digital key telephone system and extension terminal device thereof | Toshiaki Tanaka, Hiroshi Mano, Setsuo Kimura, Yoshihito Nagano, Masayuki Tsurusaki +4 more | 2002-04-16 |
| 6263061 | Digital button telephone system and extension terminal for the same | Toshiaki Tanaka, Hiroshi Mano, Setsuo Kimura, Yoshihito Nagano, Masayuki Tsurusaki +4 more | 2001-07-17 |
| 6243442 | Telephone exchange apparatus | Toshiaki Tanaka, Shuji Fujitsuka, Takashi Aoki | 2001-06-05 |