Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8539673 | Method and device for machining a sealing seat of a shut-off valve | Siegfried Gügel, Karl-Heinz Herzing, Volker Wurzer | 2013-09-24 |
| 5749651 | Combined feed and mixing device | Klaus Huttenhofer, Wolfgang Herr, Horst Spielmann | 1998-05-12 |
| 5225390 | Catalyst for reducing nitrogen oxides | Doris Vogel, Norbert Landgraf, Wolfgang Gajewski, Dietmar Hein, Helmut Schmelz | 1993-07-06 |
| 5045516 | Process for producing a catalyst for reducing nitrogen oxides in flue gases | Doris Vogel, Norbert Landgraf, Wolfgang Gajewski, Dietmar Hein, Helmut Schmelz | 1991-09-03 |
| 4812296 | Process utilizing catalytic material for the reduction of nitrous oxides | Helmut Schmelz, Helmut Thomann, Renate Kuschke, Eva-Helga Wilbert, Wolfgang Gajewski +5 more | 1989-03-14 |
| 4512957 | Method for the separation of uranium isotope compounds already converted isotope-selectively | Hans Niemann | 1985-04-23 |