Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4900195 | Method and apparatus for use in a slurry filled trench for providing a sealing shield therein | Klaus Kaewert, Christian Witolla, Bernd Kopp, Hans-Jurgen Rosler | 1990-02-13 |
| 4204986 | Sealing, caulking and protective shielding composition of thermoplastic synthetic materials and carbonaceous materials | Ingo Romey, Rolf Sommerfeld | 1980-05-27 |