Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5031365 | Method and apparatus for grinding the running and/or guide surfaces of rails or the like | Hans Guntermann | 1991-07-16 |
| 4389015 | Corrugation-free rail | Hans Guntermann, Gustav Baum | 1983-06-21 |
| 4375098 | Digital telecommunications system | Peter Gerke, Friedrich Roescheisen, Heinrich Bruentrup | 1983-02-22 |