Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872347 | Automated ultrasonic examination system for heat transfer tubes in a boiler | Yoshimi Okabe, Keiichi Iwamoto, Masaaki Torichigai, Joji Ichinari, Kiyoshi Koizumi | 1989-10-10 |