Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6477141 | Communication path quality monitoring method and quality monitoring apparatus | Naoyuki Izawa, Hiroya Kawasaki, Noriko Samejima | 2002-11-05 |
| 6343102 | In-station control system and method | Noriko Samejima, Yoshio Morita, Shiro Uriu | 2002-01-29 |