Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5400399 | Speech communication apparatus equipped with echo canceller | Koki Otsuka, Yuji Okuda, Masami Akamine, Koichi Ito | 1995-03-21 |
| 5396496 | Unused time slot detection and selection in a mobile radio communication system | Koichi Ito, Masayuki Tanaka | 1995-03-07 |
| 5379338 | Radiotelephone with handset talking function and hand-free talking function | Koichi Ito, Koki Otsuka | 1995-01-03 |
| 5278835 | Mobile radio communication system | Koichi Ito, Masayuki Tanaka | 1994-01-11 |
| 5263079 | Dual mode cellular radio communication apparatus having an echo canceller employed in both analog and digital modes | — | 1993-11-16 |
| 5231657 | Cordless telephone system that releases hold state of handset after intrusion by another party is detected | Koichi Ito | 1993-07-27 |
| 5210752 | Radio tele-communication system using multichannel access scheme | Koichi Ito, Masayuki Tanaka | 1993-05-11 |
| 5111499 | Cordless telephone apparatus having a ringer circuit operable during power failure | Akio Toki, Shuji Yamaguchi | 1992-05-05 |
| 5046081 | Radio telephone with variable attenuator for controlling modulated signal | — | 1991-09-03 |
| 4939766 | Radio telephone system | Isao Sasaki | 1990-07-03 |
| 4920557 | Radio communication apparatus | — | 1990-04-24 |
| 4788712 | Howler indicator in cordless telephone system | Akio Toki | 1988-11-29 |