Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889756 | Sheet-like, multilayer, laser-optical recording material | Helmut Barzynski, Karl Hellwig, Christof Taubitz | 1989-12-26 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889756 | Sheet-like, multilayer, laser-optical recording material | Helmut Barzynski, Karl Hellwig, Christof Taubitz | 1989-12-26 |