| 4939012 |
Naphtholactam dyes and optical recording medium containing these dyes |
Matthias Dust, Peter Neumann, Ernst Schefczik, Heidi Benthack-Thoms, Helmut Barzynski +2 more |
1990-07-03 |
| 4876356 |
Naphtholactam dyes and optical recording medium containing these days |
Matthias Dust, Peter Neumann, Ernst Schefczik, Heidi Benthack-Thoms, Helmut Barzynski +2 more |
1989-10-24 |
| 4668586 |
Magnetic recording media |
Albert Kohl, Milena Melzer, August Lehner, Norbert Schneider, Werner Balz +2 more |
1987-05-26 |
| 4656548 |
Tape cassette containing echo-erasing means |
Dietmar Pfefferkorn, Gerhard Nerschbach, Norbert Kreimes, Bozidar Pavelka |
1987-04-07 |
| 4567108 |
Magnetic recording media |
August Lehner, Helmut Kopke, Hermann Roller, Werner Balz, Werner Grau +1 more |
1986-01-28 |
| 4497723 |
Preparation of acicular, ferrimagnetic iron oxides |
Manfred Ohlinger, Guenter Vaeth, Peter Rudolf, Wilhelm Sarnecki, Helmut Jakusch +1 more |
1985-02-05 |
| 4472455 |
Production of magnetic recording media |
Albert Kohl, Werner Balz, Milena Melzer, Norbert Schneider, August Lehner |
1984-09-18 |
| 4453683 |
Magnetic tape cassette arrangements |
Karl-Juergen Reimer, Dietmar Pfefferkorn, Norbert Kreimes, Wilhelmus Andriessen, Herbert Wagner +1 more |
1984-06-12 |
| 4438462 |
Document identification employing exchange-anisotropic magnetic material |
Joachim Hack, Manfred Steuerwald |
1984-03-20 |
| 4430362 |
Production of magnetic recording media |
Milena Melzer, Norbert Schneider, Helmut Kopke, Klaus Schoettle, Werner Balz +1 more |
1984-02-07 |
| 4423454 |
Magnetic recording disk |
Peter Felleisen, Dieter Mayer, Friedrich Domas, Paul Deigner |
1983-12-27 |
| 4420330 |
Stabilization of pyrophoric ferromagnetic acicular metal particles consisting essentially of iron |
Helmut Jakusch, Werner Loeser, Peter Rudolf, Werner Senkpiel, Werner Steck |
1983-12-13 |
| 4414287 |
Magnetic recording medium and its manufacture |
Eckhart Kneller, Roland Koenig, Werner Grau, Dieter Mayer |
1983-11-08 |
| 4396886 |
Document authentication by means of exchange-anisotropic magnetic material |
Joachim Hack, Manfred Steuerwald |
1983-08-02 |
| 4382244 |
Device for magnetically orienting the magnetizable particles or magnetic recording media in a preferred direction |
Paul Deigner, Dieter Schaefer, Karl Uhl, Roland Falk |
1983-05-03 |
| 4287225 |
Process of making a magnetic recording medium |
Eckhart Kneller, Roland Koenig, Werner Grau, Dieter Mayer |
1981-09-01 |
| 4287233 |
Manufacture of acicular cobalt-containing magnetic iron oxide |
Peter Rudolf, Werner Steck, Manfred Ohlinger, Christof Jaeckh |
1981-09-01 |
| 4221776 |
Manufacture of acicular ferrimagnetic iron oxides |
Horst Autzen, Helmut Jakusch, Werner Loeser, Peter Rudolf, Wilhelm Sarnecki +1 more |
1980-09-09 |
| 4213222 |
Cleaning apparatus for a web of plastics film having a magnetic coating |
Klaus Schoettle, Peter Dobler, Helmut Lewin |
1980-07-22 |
| 4213959 |
Manufacture of acicular, ferrimagnetic iron oxide |
Rudolf Brodt, Helmut Jakusch, Werner Loeser, Manfred Ohlinger, Wilhelm Sarnecki +1 more |
1980-07-22 |
| 4201149 |
Apparatus for spin coating in the production of thin magnetic layers for magnetic discs |
Paul Deigner, Roland Falk, Karl Uhl, Dieter Schaefer, Dieter Mayer +2 more |
1980-05-06 |
| 4201486 |
Process for the manufacture of magnetic recording media |
Werner Huebner, Job-Werner Hartmann, Friedrich Domas, Peter Nagel, Paul Deigner +1 more |
1980-05-06 |
| 4188302 |
Manufacture of acicular cobalt-modified magnetic iron oxide |
Hans-Juergen Becker, Christof Jaeckh, Werner Loeser, Manfred Ohlinger, Werner Steck |
1980-02-12 |
