Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6274532 | Method of making a completely-metallic oxidation catalyst | Wilfried Herda, Jurgen Koppe, Hartmut Lausch | 2001-08-14 |
| 6203632 | Oxidation-resistant metal foil, its use and method for its production | Angelika Kolb-Telieps, Ralf Hojda | 2001-03-20 |
| 5843394 | Catalyst for the oxidation of gaseous sulphur compounds | Wilfried Herda, Jurgen Koppa, Harmut Lausch | 1998-12-01 |
| 5695716 | Austenitic alloys and use thereof | Michael Köhler, Kurt-Wilhelm Eichenhofer, Michael Renner | 1997-12-09 |
| 5429690 | Method of precipitation-hardening a nickel alloy | Michael Köhler, Greg Chitwood, Jon Bryant | 1995-07-04 |
| 5417918 | Austenitic nickel alloy | Michael Köhler | 1995-05-23 |
| 5296054 | Austenitic steel | Levin F. Lvovich, Goronkova A. Dmitrievna, Kzasnykh V. Ivanovich, Rolf Kirchheiner, Michael Köhler | 1994-03-22 |
| 4906437 | Corrosion resistant hot and cold forming parts of Ni-Cr-Mo alloy and method of making same | Michael Köhler, Manfred Rockel, Ernst Wallis | 1990-03-06 |
| 4876065 | Corrosion-resisting Fe-Ni-Cr alloy | Manfred Rockel, Ernst Wallis, Michael Köhler, Rolf Kirchheiner | 1989-10-24 |
| 4436790 | Gold-colored coin material | Bruno Prinz, Manfred Rockel, Gunther Rudolph, Hugo Zoebe | 1984-03-13 |
| 4401488 | Gold-colored coin material | Bruno Prinz, Manfred Rockel, Gunther Rudolph, Hugo Zoebe | 1983-08-30 |
| 4364807 | Method of electrolytically recovering zinc | Adolf Von Ropenack, Gunter Stock | 1982-12-21 |
| 4310353 | Low-antimony lead alloy | Eberhard Nann | 1982-01-12 |