Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5615481 | Method and apparatus for the production of circumferentially compressible pipe fittings | Walter Viegener, Wolfgang Grau | 1997-04-01 |
| 5452502 | Turret-type machine tool | Wolfgang Grau, Helmut Heselschwerdt | 1995-09-26 |
| 4473930 | Automatic transfer machine tool with circular supply movement | Heinz Bezner, Manfred Bratz, Sven Frank, Wolfgang Grau, Hans-Jorg Semsky +2 more | 1984-10-02 |
| 4462723 | Internal broaching tool | Horst Hahn | 1984-07-31 |