Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5775978 | Method for the fine machining of piston rings and apparatus for carrying out same | Eberhard Schneider | 1998-07-07 |
| 4856105 | Method and apparatus for making piston rings | Rolf Luckger, Hans-Gerd Kroschel, Jochen Stechow | 1989-08-08 |
| 4679472 | Method and apparatus for machining the circumference of out-of-round workpieces, particularly piston rings | Otto Feller, Rolf Luckger | 1987-07-14 |