Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6484034 | Radio handset and position location system | Katsuhiko Tsunehara, Kenzaburo Fujishima, Koji Watanabe | 2002-11-19 |
| 6459402 | Method for measuring distance and position using spectrum signal, and an equipment using the method | Katsuhiko Tsunehara, Nobukazu Doi, Tomoaki Ishifuji | 2002-10-01 |