Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5144620 | Cross-connection network using time switch | Yasutoshi Ishizaki, Yoshinori Rokugo, Hisashi Sakaguchi, Kuniyasu Hayashi | 1992-09-01 |
| 4935921 | Cross-connection network using time switch | Yasutoshi Ishizaki, Yoshinori Rokugo, Hisashi Sakaguchi, Kuniyasu Hayashi | 1990-06-19 |
| 4684925 | Method and apparatus for converting an analog signal to a digital signal using an oversampling technique | — | 1987-08-04 |
| 4554670 | System and method for ADPCM transmission of speech or like signals | Shinichi Aiko, Takao Nishitani | 1985-11-19 |
| 4467315 | Digital compandor having nonlinear companding characteristics | Atsushi Tomozawa | 1984-08-21 |
| 4393367 | Digital compandor having nonlinear companding characteristics | Atsushi Tomozawa | 1983-07-12 |
| 4392234 | PCM Signal interface apparatus | — | 1983-07-05 |