Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879924 | Gearing for driving the rolls of a roll train | Helmut Holthoff | 1989-11-14 |
| 4848185 | Transmission for driving the rolls of a rolling line | Helmut Holthoff | 1989-07-18 |
| 4827749 | Methods and apparatus for reducing seizing in transverse rolling of seamless tube blanks | Karlhans Staat | 1989-05-09 |
| 4798071 | Seamless tube production | Karlhans Staat | 1989-01-17 |