Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869965 | Process for the production of a magnetic recording medium | Johannes Gerum, Walter Meckel | 1989-09-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869965 | Process for the production of a magnetic recording medium | Johannes Gerum, Walter Meckel | 1989-09-26 |