Issued Patents All Time
Showing 76–99 of 99 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5500459 | Heat-sealing of semicrystalline polymers with metals | Alfred Hagemeyer, Dieter Baeuerle, Johannes Heitz | 1996-03-19 |
| 5462701 | Sheet-like polyethylene terephthalate materials having slight surface roughness, their preparation and their use | Alfred Hagemeyer, Hans-Peter Schildberg, Dieter Baeuerle, Johannes Heitz | 1995-10-31 |
| 5417896 | Preparation of sheet-like polyethylene terephthalate materials having little surface roughness | Gerd Fischer, Alfred Hagemeyer, Hans J. Richter, Hans-Peter Schildberg, Sylvain Lazare +1 more | 1995-05-23 |
| 5356511 | Production of a polymer/metal or polymer/semiconductor composite | Peter Hoessel, Klaus Harth, Gerhard Hoffmann | 1994-10-18 |
| 5290590 | Production of magnetic recording medium | Hans J. Richter, Gerd Fischer | 1994-03-01 |
| 5270149 | Reversible optical recording medium of the phase charge type | Stefan Iselborn, Gerd Fischer | 1993-12-14 |
| 5193085 | Magneto-optical recording medium with exchange-coupled reproducing layer containing platinum | Klaus Harth | 1993-03-09 |
| 5192583 | Production of a magnetic recording medium | Hans J. Richter, Gerd Fischer | 1993-03-09 |
| 5188865 | Production of a magnetic recording medium | Hans J. Richter, Gerd Fischer | 1993-02-23 |
| 5084319 | Disk-shaped magnetic recording media, their production and information stores containing these recording media | Arend Werner, Joachim Hack, Heinrich Mannsperger, Michael Hitzfeld, Werner Grau +2 more | 1992-01-28 |
| 5047161 | Preparation of isometric cobalt- and titanium-containing magnetic iron oxides | Werner Steck, Helmut Jakusch | 1991-09-10 |
| 4997675 | Production of magnetic recording media for perpendicular recording | Arend Werner, Erich Haedicke | 1991-03-05 |
| 4900397 | Production of magnetic recording media | Arend Werner, Erich Haedicke, Johann Kronenbitter | 1990-02-13 |
| 4830465 | Irreversible optical recording media and fabrication thereof | Arend Werner, Helmut Barzynski | 1989-05-16 |
| 4766021 | Optical recording medium | Arend Werner, Juergen Petermann | 1988-08-23 |
| 4764300 | Preparation of finely divided and acicular hexagonal ferrites and their use for the production of magnetic recording media and plastoferrites | Peter Rudolf, Helmut Jakusch | 1988-08-16 |
| 4680130 | Preparation of finely divided isotropic ferrite powders having the spinel structure | — | 1987-07-14 |
| 4675170 | Preparation of finely divided acicular hexagonal ferrites having a high coercive force | Peter Rudolf, Graham E. McKee | 1987-06-23 |
| 4670332 | Irreversible optical medium for information storage, and its production | Arend Werner, Klaus D. Schomann | 1987-06-02 |
| 4664831 | Preparation of finely divided ferrite powders | Udo Kullmann | 1987-05-12 |
| 4650597 | Preparation of finely divided isotropic cobalt-containing ferrite powder | Helmut Jakusch | 1987-03-17 |
| 4469669 | Preparation of ferrites from iron (II) sulfate | — | 1984-09-04 |
| 4425250 | Preparation of finely divided ferrite powders | — | 1984-01-10 |
| 4401643 | Preparation of finely divided barium ferrite of high coercivity | Helmut Jakusch | 1983-08-30 |