Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6352660 | Preparation of composite fibers and diaphragms | Holger Friedrich, Ulrich Bröckel, Dieter Schlafer, Klaus-Dieter Hoppe, Peter Palm | 2002-03-05 |
| 5919348 | Modification of the flow resistance of diaphragms | Holger Friedrich, Klaus-Dieter Hoppe, Bernd Leutner, Dieter Schlafer | 1999-07-06 |
| 5755951 | Regeneration of plastic diaphragm | Rudi Kroner, Bernd Leutner, Hans-Michael Schneider, Holger Friedrich, Dieter Schlafer +1 more | 1998-05-26 |