Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889756 | Sheet-like, multilayer, laser-optical recording material | Helmut Barzynski, Karl Hellwig, Christof Taubitz | 1989-12-26 |
HB
Heidi Benthack-Thomas
Overall (1989): #35,316 of 140,708Top 30%
1
Patents 1989