Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6212925 | Method for roll forming steel pipes, and equipment for same | Feizhou Wang | 2001-04-10 |
| 5878614 | Finn pass forming device for forming seam welded steel pipes and roller device available for forming seam welded steel pipes of a plurality of sizes | — | 1999-03-09 |