Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6636741 | Cellular telephone with automated redial functions | Kenji Yoshioka, Kazuo Shibuya | 2003-10-21 |
| 6448927 | Position information system | Toshihiro Ishigaki, Masaki Arima, Akifumi Miyano | 2002-09-10 |
| 6392316 | Emergency informing apparatus | Kenji Yoshioka | 2002-05-21 |
| 6262655 | Emergency reporting system and terminal apparatus therein | Kenji Yoshioka, Yukio Ichikawa | 2001-07-17 |