Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796137 | Protective jacket for a disk-shaped recording medium | Dietrich Gruehn, Joachim Hack, Hubert Fehrenbach, Norbert Holl | 1989-01-03 |
PR
Peter Rudolf
Overall (1989): #69,334 of 140,708Top 50%
1
Patents 1989