Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7740042 | Apparatus for vibration welding of sheet materials | Volkhard Muller, Stephan Priewich, Werner Uehlemann | 2010-06-22 |
| 7740422 | Method for producing large surface area geogrids with high tensile strength and large surface area geogrids | Volkhard Muller, Stephan Priewich, Werner Uehlemann | 2010-06-22 |
| 6572718 | Method for producing large surface area geogrids with high tensile strength | Volkhard Muller, Stephan Priewich, Werner Uehlemann | 2003-06-03 |
| RE37295 | Water and/or oil-impermeable sealing mat consisting substantially of a substrate layer, a layer of swellable clay and a cover layer | Karsten Johannssen, Volkhard Muller | 2001-07-24 |
| 5428877 | Sealing sheeting of swellable clay impervious to water and/or oil | — | 1995-07-04 |
| 5322581 | Join in the overlapped zone of needle punched bentonite sealing sheets | Volkard Muller | 1994-06-21 |
| 5221568 | Water and/or oil-permeable sealing mat consisting substantially of a substrate layer, a layer of swellable clay and a cover layer | Karsten Johannssen, Volkard Muller | 1993-06-22 |