Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839654 | System for detecting underground objects | Masaaki Ito, Shiro Odagiri, Kouji Maeda, Yasuhiro Uekubo, Aiko Jitumori | 1989-06-13 |
| 4831383 | System for detecting underground objects | Hiroyasu Ohnishi, Tatsukichi Matsuura, Kouji Maeda, Yasuhiro Uekubo, Akio Jitumori | 1989-05-16 |