Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6600816 | Connection management servicing method for communication channel | — | 2003-07-29 |
| 6400962 | Mobile communication terminal | — | 2002-06-04 |
| 6188902 | Multiple communication system, exchange, and terminal device | — | 2001-02-13 |
| 6148215 | Mobile communication terminal | Masayuki Doi | 2000-11-14 |
| 5640401 | Communication circuit fault detector | — | 1997-06-17 |
| 5485470 | Communication circuit fault detector | — | 1996-01-16 |
| 4979166 | Multiplexing apparatus | — | 1990-12-18 |