Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4755222 | Sinter alloys based on high-speed steel | Barbara Heinze, Hans-Peter Koch, Hans Obenaus | 1988-07-05 |
| 4728362 | High voltage electrodes for the ignition system of internal combustion engines and method for making the same | Werner Grunwald, Hans-Peter Koch, Hans Neu | 1988-03-01 |