Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4341938 | Method and apparatus for seam-welding steel pipes | Hiroyoshi Matsubara, Kenji Takeshige, Tatsumi Osuka, Takashi Nagamine, Jinkichi Tanaka +2 more | 1982-07-27 |
| 4320277 | Thick welded steel pipe of large diameter and production thereof | Tadaaki Taira, Kiyoteru Hirabayashi, Hiroyuki Ichinose, Motoaki Suzuki | 1982-03-16 |