Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4732813 | Magnetic recording element | Henricus J. M. Pigmans | 1988-03-22 |
| 4678705 | Composition and method for making magnetic recording elements | Henricus J. M. Pigmans | 1987-07-07 |
| 4467382 | Magnetic recording and playback device having means for reducing head corrosion | — | 1984-08-21 |
| 4425409 | Method of preparing a magnetic pigment of .gamma.-Fe.sub.2 O.sub.3 particles and recording element | Harm J. Groen | 1984-01-10 |
| 4384012 | Method of manufacturing a magnetic recording element | Johannes G. C. M. deBres | 1983-05-17 |
| 4349385 | Method of preparing a FeOOH pigment | Harm J. Groen | 1982-09-14 |
| 4197357 | Magnetic recording element in which a salt of an amine and a phosphoric acid ester are used as a dispersion agent | — | 1980-04-08 |
| 4196258 | Magnetic recording medium and method of manufacturing same | Willem J. Cats | 1980-04-01 |