Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10738371 | As-rolled type K55 electric resistance welded oil well pipe and hot-rolled steel sheet | Tetsuo Ishitsuka, Shuji Iwamoto, Shunichi Kobayashi, Toshiyuki Ogata, Osamu Yoshida +1 more | 2020-08-11 |
| 10640843 | High strength electric resistance welded steel pipe and method for producing high strength electric resistance welded steel pipe | Tetsuo Ishitsuka, Shuji Iwamoto, Shunichi Kobayashi, Osamu Yoshida, Hideto Kawano | 2020-05-05 |