Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5084319 | Disk-shaped magnetic recording media, their production and information stores containing these recording media | Hartmut Hibst, Arend Werner, Heinrich Mannsperger, Michael Hitzfeld, Werner Grau +2 more | 1992-01-28 |
| 5050015 | Method and arrangement for reducing wear in a magnetic storage means | Werner Grau, Werner Sickmueller, Heinrich Mannsperger, Helmut Jakusch | 1991-09-17 |
| 4891114 | Magnetic recording media | Michael Hitzfeld, Werner Grau | 1990-01-02 |
| 4796137 | Protective jacket for a disk-shaped recording medium | Dietrich Gruehn, Hubert Fehrenbach, Peter Rudolf, Norbert Holl | 1989-01-03 |
| 4626944 | Positioning device for scanning means in a disk drive unit | Klaus Schulze-Berge, Klaus Birkenmeier | 1986-12-02 |
| 4623942 | Method and arrangement for detecting error signals in a disk-drive, and a magnetic test disk therefor | Gerold Kraus, Walter Huber, Klaus Schulze-Berge, Roland Sold | 1986-11-18 |
| 4597990 | Preparation of magnetic recording media | Hermann Roller, Uwe Woweries, August Lehner, Werner Grau, Peter Nagel +1 more | 1986-07-01 |
| 4551359 | Production of magnetic recording media | August Lehner, Karl Krucker, Werner Balz, Karl H. Roemer, Peter Rudolf +2 more | 1985-11-05 |
| 4534999 | Production of magnetic recording media having a backing coating | Hermann Roller, August Lehner, Werner Grau, Werner Balz, Reinhold Baur | 1985-08-13 |
| 4514937 | Method for the surface treatment of magnetic recording media | Manfred Gehrung, Klaus Schoettle, Helmut Kreissler, Peter Rudolf, Friedrich Anslinger | 1985-05-07 |
| 4438462 | Document identification employing exchange-anisotropic magnetic material | Eberhard Koester, Manfred Steuerwald | 1984-03-20 |
| 4430678 | Drive apparatus for recording disks in which the disk is clamped between a driven recessed member and a rotatably mounted clamping member | Roland Brotzler, Klaus Schulze-Berge, Rudolf Angermann | 1984-02-07 |
| 4396886 | Document authentication by means of exchange-anisotropic magnetic material | Eberhard Koester, Manfred Steuerwald | 1983-08-02 |
| 4346413 | Magnetic head positioning servo arrangement for a system for recording/reproducing information on a magnetic recording medium, particularly on a flexible magnetic recording medium | — | 1982-08-24 |
| 4327139 | Rigid magnetic recording disk having perfluoropolyether lubricant | Dieter Schaefer, Herbert Motz, Dieter Mayer, Paul Deigner, Roland Falk | 1982-04-27 |
| 4320171 | Magnetic recording media containing elastomeric polyurethane binders in the magnetic coating | Herbert Motz, August Lehner, Heinrich Hartmann, Rudolf Bachmann, Hans-Joerg Hartmann +4 more | 1982-03-16 |
| 4303951 | Device for compensating unequal write fields in magnetic data-storage devices, especially in disc memories | — | 1981-12-01 |