Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7545798 | Communication system for controlling a call portion | Makoto Oouchi | 2009-06-09 |
| 6507578 | Channel division control equipment of the ISDN primary rate interface circuit | Kiyokazu Sanpei, Junichi Aita | 2003-01-14 |
| 6141343 | Channel division control equipment of the | Kiyokazu Sanpei, Junichi Aita | 2000-10-31 |