Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5696819 | Speech communication apparatus | Yuji Umemoto | 1997-12-09 |
| 5450442 | Digital radio telephone apparatus having an equalizer selectively employed in the apparatus | Yuji Umemoto, Kaoru Tatsumi, Mutsumu Serizawa | 1995-09-12 |