Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5304789 | Multilayer card-shaped data carrier and method for producing same | Erwin Lob, Hansjurgen Merkle, Alexander Hierweger, Wittlich Kaule | 1994-04-19 |
| 5298922 | Multilayer data carrier and methods for writing on a multilayer data carrier | Hansjurgen Merkle, Joseph Lass, Alexander Hierweger, Erwin Lob | 1994-03-29 |