| 11702548 |
Method for producing pigment fragments with a predefined internal and/or external contour, and pigment fragments |
Christian Fuhse, Manfred Heim, Michael Rahm, Thomas Mang, Christoph Mengel +3 more |
2023-07-18 |
| 11034182 |
Disc-shaped pigment, printing ink, security element and method of production |
Christian Fuhse, Michael Rahm, Manfred Heim, Peter Schiffmann, Christoph Mengel |
2021-06-15 |
| 9683972 |
Method and device for examining a sheet-shaped or card-shaped valuable document having a security feature having one or more cavities |
Jan Domke, Stefan Kokrhoun, André Gregarek |
2017-06-20 |
| 9248689 |
Method for the production of security elements having registered layers of designs |
Winfried Hoffmuller, Manfred Heim, Theodor Burchard |
2016-02-02 |
| 9238383 |
Method for the production of security elements having mutually registered designs |
Winfried Hoffmuller, Manfred Heim |
2016-01-19 |
| 8685488 |
Method for producing a microstructure |
Winfried Hoffmuller, Theodor Burchard, Marius Dichtl, Michael Rahm, Manfred Heim +4 more |
2014-04-01 |