Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6415155 | Location system and method for identifying position of mobile terminal that can communicate based on repeater in radio zone, and mobile terminal that can communicate based on repeater in radio zone | Hiroaki Koshima, Katsuhiko Kumamoto | 2002-07-02 |
| 6349211 | Position display system of mobile terminal | Hiroaki Koshima, Katsuhiko Kumamoto, Hiroyuki Kurokawa, Ryuichi Iwagami | 2002-02-19 |
| 6347230 | Position display system of mobile terminal | Hiroaki Koshima, Katsuhiko Kumamoto, Hiroyuki Kurokawa, Ryuichi Iwagami | 2002-02-12 |