Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4799209 | Clamping device for clamping an optical disc onto a drive spindle | — | 1989-01-17 |
HG
Henri M. Grobben
Overall (1989): #106,919 of 140,708Top 80%
1
Patents 1989