Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6671760 | Switching system for controlling internal apparatuses in an exchange system | Hiroya Kawasaki, Atsushi Fujihira, Kiyofumi Mitsuze, Hidetoshi Iwasa | 2003-12-30 |
| 6477141 | Communication path quality monitoring method and quality monitoring apparatus | Naoyuki Izawa, Hiroya Kawasaki, Noriko Samejima | 2002-11-05 |
| 6343102 | In-station control system and method | Noriko Samejima, Yoshio Morita, Shiro Uriu | 2002-01-29 |
| 5958069 | Apparatus for preventing malfunction at time of duplex unit failure | Hiroya Kawasaki, Shiro Uriu, Yukinaga Toyoda, Kazumasa Sonoda | 1999-09-28 |
| 5329538 | Circuit for providing digital data having high clarity in a digital signal receiver | Hisato Kawano, Takashi Tabu, Shigeru Sekine | 1994-07-12 |
| 5299187 | Time-multiplexed highway line designating system | Takashi Tabu, Kenichi Okabe | 1994-03-29 |