Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4464209 | Clad steel pipe excellent in corrosion resistance and low-temperature toughness and method for manufacturing same | Junichiro Takehara, Yasuo Kobayashi, Kazuyoshi Ume | 1984-08-07 |
| 4373365 | Up-set shrinker for producing thick wall steel pipe | Toshio Ishihara, Junichiro Takehara | 1983-02-15 |
| 4339941 | Method and apparatus for producing thick welded steel pipe | Toshio Ishihara, Hiromichi Itoshima, Yutaka Mihara, Takashi Kogawa | 1982-07-20 |
| 4320277 | Thick welded steel pipe of large diameter and production thereof | Kiyoteru Hirabayashi, Hiroyuki Ichinose, Osamu Hirano, Motoaki Suzuki | 1982-03-16 |