Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5666779 | Method of forming a pressure free expansion anchorage | Antonius Winkeljann | 1997-09-16 |
| 5649515 | Diesel fuel preheater for engines | Axel Glet, Dirk Hendrich, Wolfgang Jordan | 1997-07-22 |