Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4772771 | Method for the production of high strength electric seam welded oil-well pipe | Hiroshi Murayama, Motofumi Koyuba | 1988-09-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4772771 | Method for the production of high strength electric seam welded oil-well pipe | Hiroshi Murayama, Motofumi Koyuba | 1988-09-20 |