Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7033852 | Method and device for passivation of the resonator end faces of semiconductor lasers based on III-V semiconductor material | Nils Kirstaedter | 2006-04-25 |
| 6945083 | Method of and apparatus for determining the eccentricity of a hollow billet | Martin Sauerland | 2005-09-20 |
| 6715332 | Method of drawing metal workpieces and drawing unit for a drawing machine | Hermann-Josef Klingen, Norbert Zillekens | 2004-04-06 |
| 6688152 | Modular drawing apparatus and drawing | Hermann-Josef Klingen, Norbert Zillekens | 2004-02-10 |
| 6523385 | Process for preparing the end of a pipe for drawing over a mandrel | — | 2003-02-25 |
| 5855136 | Process and device for threading elongated metal workpieces, especially tubes, into a drawing apparatus | Erling Roller, Karl Kemmerling | 1999-01-05 |
| 5771727 | Process and device for straight-drawing long drawing material in multiple steps | Horst Stinnertz, Peter Kalkenings | 1998-06-30 |
| 5649440 | Method for calibration of assel rollers | Gheorghe Arnautu, Jurgen Pietsch, Gunther Voswinckel, Karl-Helmut Wengenroth | 1997-07-22 |
| 5584203 | Rolling mandrel changing device for a plug mill | Hans Eversberg, Burkhard Schifferings | 1996-12-17 |
| 5548987 | Roll mandrel monitoring arrangement in cold pilger mills | — | 1996-08-27 |
| 5412974 | Method of producing seamless pipes utilizing a plug rolling procedure | — | 1995-05-09 |
| 5357773 | Method of longitudinal rolling of seamless pipe | Johann H. Rohde, Burkhart Schifferings, Rolf Kümmerling, Jochen Vochsen, Gunther Voswinckel | 1994-10-25 |
| 5355753 | Method and arrangement for cutting cold pilgered tubes | Horst Stinertz, Werner Henze | 1994-10-18 |