Issued Patents All Time
Showing 25 most recent of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6231963 | Magnetic recording media | August Lehner, Helmut Jakusch, Volker Koch, Albert Kohl, Werner Lenz +7 more | 2001-05-15 |
| 5569409 | Finely divided acicular magnetic modified chromium dioxide | Harald Jachow, Reinhard K orner, Ronald J. Veitch, Ekkehard Schwab, Helmut Jakusch +2 more | 1996-10-29 |
| 5496633 | Transfer film with magnetic layer | Manfred Steuerwald, Jenoe Kovacs, Dieter Schwarz | 1996-03-05 |
| 5378383 | Process for preparing modified chromium dioxide | Harald Jachow, Ekkehard Schwab, Reinhard Koerner, Norbert Mueller, Rudi Lehnert +4 more | 1995-01-03 |
| 5264292 | Transfer film having magnetic layers | Jenoe Kovacs, Manfred Steuerwald | 1993-11-23 |
| 5209970 | Magnetic recording media | Jenoe Kovacs | 1993-05-11 |
| 5164173 | Preparation of stabilized acicular ferromagnetic chromium dioxide | Norbert Muller, Rainer Feser, Bernhard Bottcher, Peter Rudolf, Werner Hubner | 1992-11-17 |
| 5096779 | Chromium dioxide material, its preparation and magnetic recording media containing this chromium dioxide material | Michael Mueller, Ekkehard Schwab, Helmut Auweter, Rainer Feser, Werner Huebner +2 more | 1992-03-17 |
| 5030371 | Process for preparing acicular ferromagnetic material consisting essentially of iron-containing chromium dioxide | Michael Mueller, Ekkehard Schwab, Helmut Auweter, Rainer Feser, Rudi Lehnert +1 more | 1991-07-09 |
| 4741895 | Preparation of chromium(III) oxide | Norbert Mueller, Bernhard Boettcher, Helmut Reinicke, Gerhard Honecker | 1988-05-03 |
| 4670177 | Preparation of ferromagnetic chromium dioxide | Norbert Mueller, Peter Rudolf, Eugen Wettstein | 1987-06-02 |
| 4619777 | Preparation of a magnetic dispersion | Milena Melzer, Helmut Jakusch, Werner Grau, Eberhard Koster, Werner Loser +3 more | 1986-10-28 |
| 4521527 | Molded iron catalyst and its preparation | Gerhard Frank, Peter Rudolf, Gerald Neubauer, Hans J. Wilfinger, Emil Pfannebecker +1 more | 1985-06-04 |
| 4497723 | Preparation of acicular, ferrimagnetic iron oxides | Guenter Vaeth, Peter Rudolf, Wilhelm Sarnecki, Helmut Jakusch, Eberhard Koester +1 more | 1985-02-05 |
| 4492804 | Preparation of primary amines | Gerhard Frank, Peter Rudolf, Gerald Neubauer, Paul Duffner, Hans J. Wilfinger +1 more | 1985-01-08 |
| 4457982 | Acicular ferrimagnetic iron oxide and its preparation | Peter Rudolf, Jenoe Kovacs, Guenter Vaeth | 1984-07-03 |
| 4378240 | Preparation of acicular ferromagnetic metal particles consisting essentially of iron | Hansjoerg Siegle, Hans H. Reich, Horst Autzen, Werner Steck, Werner Loeser +1 more | 1983-03-29 |
| 4367214 | Manufacture of acicular ferrimagnetic iron oxide | Wilhelm Sarnecki, Laszlo Marosi, Horst Autzen, Werner Steck | 1983-01-04 |
| 4362708 | Preparation of acicular gamma-iron(III) oxide of high coercive force | Hans Reichert, Guenter Vaeth, Friedrich R. Faulhaber, Horst Autzen, Peter Rudolf +1 more | 1982-12-07 |
| 4344791 | Manufacture of acicular ferromagnetic iron particles | Werner Steck, Wilhelm Sarnecki, Laszlo Marosi, Werner Loeser | 1982-08-17 |
| 4340494 | Process for the manufacture of ferromagnetic chromium dioxide | Guenter Vaeth, Norbert Mueller, Eugen Wettstein | 1982-07-20 |
| 4295879 | Manufacture of acicular ferromagnetic iron particles | Werner Steck, Wilhelm Sarnecki, Laszlo Marosi, Horst Autzen | 1981-10-20 |
| 4287233 | Manufacture of acicular cobalt-containing magnetic iron oxide | Peter Rudolf, Werner Steck, Eberhard Koester, Christof Jaeckh | 1981-09-01 |
| 4275114 | Magnetic recording medium and method of stabilization of chromium dioxide magnetic pigments | Eduard Schoenafinger, Herbert Motz, Paul Deigner, Werner Grau | 1981-06-23 |
| 4271234 | Iron oxide magnetic pigments for the production of magnetic coatings | Eduard Schonafinger, Paul Deigner, Helmut Jakusch, Jurgen Amort, Heinz Nestler +2 more | 1981-06-02 |