Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5304789 | Multilayer card-shaped data carrier and method for producing same | Erwin Lob, Hansjurgen Merkle, Wolfgang Killar, Wittlich Kaule | 1994-04-19 |
| 5298922 | Multilayer data carrier and methods for writing on a multilayer data carrier | Hansjurgen Merkle, Joseph Lass, Wolfgang Killar, Erwin Lob | 1994-03-29 |
| 5122813 | Method of making a multilayer identification card usable as a printing block | Joseph Lass, Hansjurgen Merkle, Erwin Lob | 1992-06-16 |
| 5005872 | Multilayer identity card usable as a printing block and a method of producing it | Joseph Lass, Hansjurgen Merkle, Erwin Lob | 1991-04-09 |
| 4765656 | Data carrier having an optical authenticity feature and methods for producing and testing said data carrier | Wolfgang Becker, Hansjurgen Merkle, Erwin Lob, Joseph Lass, Wittich Kaule | 1988-08-23 |