Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6295854 | Device and method for moulding a grooved structure into a tubular workpiece | Bernd Stein, Karl-Heinz Putz, Wilhelm Zimmermann | 2001-10-02 |
| 6253589 | Flow-turning device and method for producing internally geared wheels using two sets of internal toothing | Karl-Heinz Putz, Bernd Stein, Wilhelm Zimmermann | 2001-07-03 |
| 6038901 | Method and device for producing press-rolled pipes with inner wall thickenings at the ends | Bernd Stein, Heinz Lehnert, Wilhelm Zimmermann | 2000-03-21 |