Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5103893 | Method and apparatus for detecting level of molten metal | Yoichi Naganuma | 1992-04-14 |
| 4485650 | Method of measuring the normalized magnitude of ring opening in spiral pipe | Hiroshi Yamamoto, Keisuke KAWAGUCHI | 1984-12-04 |