Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843507 | Magnetic head with laminated structure | Herbert Schewe, Dietrich Stephani | 1989-06-27 |
| 4816311 | Recording medium that can be magnetized vertically and method for manufacturing same | — | 1989-03-28 |
| 4803106 | Disc-shaped carrier body for a recording medium and method for manufacturing same | Karl-Rupprecht Hub | 1989-02-07 |