Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4900195 | Method and apparatus for use in a slurry filled trench for providing a sealing shield therein | Aloys Schlutter, Klaus Kaewert, Christian Witolla, Bernd Kopp | 1990-02-13 |