Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4988210 | Method and apparatus for detecting defective portion on outer surface of pipe | Toshio Koshihara, Koji Ishihara, Shunichiro Ishida, Haruhito Okamoto, Yuji Matoba | 1991-01-29 |