Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4471521 | Rotary head for machining and simultaneously polishing the peripheral surface of shafts or the like | Gunter Gerhardt, Horst Lorenz | 1984-09-18 |
| 4223578 | Apparatus and method for internally peeling pipes | Heinz Hartkopf, Eberhand Tuckmantel, Wilhelm Schweer | 1980-09-23 |