Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6490226 | Ultrasonic sonar and method using transmission frequency different from reverberation frequency | Nobuyuki Iwasaki, Takeo Tsuzuki, Tanemichi Chiba, Fumio Asakura | 2002-12-03 |