Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689811 | Communication system for communicating information ascertaining why reply information was not transmitted | Rikuo Hatano | 1997-11-18 |
| 5657232 | Onboard positioning system | Seiji Ishikawa, Yuichi Murakami, Tomio Yasuda | 1997-08-12 |
| 5631838 | Apparatus for verifying GPS satellite data | Seiji Ishikawa, Yuichi Murakami, Tomio Yasuda, Tomohiro Yamamoto | 1997-05-20 |