Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8166792 | Method of making a seamless hot-finished steel pipe, and device for carrying out the method | Christoph Prasser, Rolf Kümmerling, Stefan Wiedenmaier, Rupert Wieser, Robert Koppensteiner | 2012-05-01 |
| 4981118 | Poppet valve for internal combustion engine | — | 1991-01-01 |