Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879740 | Wide area cordless telephone system having means for avoiding double registrations | Noriaki Nagashima, Kohji Monma | 1989-11-07 |
| 4852148 | Radio telephone system | Toshihiko Shibata, Mitsuo Sato, Noriaki Nagashima | 1989-07-25 |
| 4843622 | Communication control system capable of searching a called telephone set in a mobile radio telephone network | Akio Yotsutani, Yukihiro Sako, Toshihiko Shibata | 1989-06-27 |
| 4833702 | Telephone registration and cancellation control in a wide area cordless telephone system | Kenji Shitara, Akio Sasaki | 1989-05-23 |
| 4802200 | Radio telephone system control apparatus and method | Kazuhiro Yoshizawa, Akio Yotsutani, Koichi Ito | 1989-01-31 |