Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856105 | Method and apparatus for making piston rings | Manfred Brocksieper, 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, Manfred Brocksieper | 1987-07-14 |