Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6266987 | Disk roll exchanging apparatus for vertical piercing mill and disk roll exchanging method | Hisao Goto | 2001-07-31 |
| 6253593 | Piercer roll exchanging apparatus for vertical piercing mill and piercer roll exchanging method | Hisao Goto | 2001-07-03 |
| 6158262 | Piercing mill and cannon exchange method | Hisao Goto | 2000-12-12 |