Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5891562 | Multi-layer, flexible transfer tape comprising polymeric hollow particles a process for the production thereof | Wolfgang Giersemehl, Wolfgang Bauersachs, Karl Weissmann, Lothar Titze | 1999-04-06 |
| 5135798 | Multilayer, flexible transfer strip | Sigo Muschter, Ernst Kunkel, Petra Bubolz | 1992-08-04 |
| 4891260 | Multilayer flexible transfer ribbon | Ernst Kunkel, Petra Bubolz, Sigo Muschter | 1990-01-02 |
| 4871620 | Typewriter ribbon having a thin support and a transferable mass, for typing on varied surfaces | Ernst Kunkel | 1989-10-03 |