Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4348731 | Automatic working apparatus and method of controlling the same | — | 1982-09-07 |
| 4339941 | Method and apparatus for producing thick welded steel pipe | Tadaaki Taira, Toshio Ishihara, Hiromichi Itoshima, Yutaka Mihara | 1982-07-20 |