Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5186217 | Fluid-impervious structure and method of making same | Wolfgand Kahlert, Heinz Wind, Friedrich Lehmann | 1993-02-16 |
| 4919170 | Flow duct for the flue gas of a flue gas-cleaning plant | Wolfgang Hahlert, Peter R. Thom | 1990-04-24 |
| 4844662 | Sealing barrier for subterranean purposes | Wolfgang Kahlert | 1989-07-04 |