Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5365348 | Process for printing a halftone image | Friedrich-Wilhelm Drees, Raimund Nisius, Wolfgang Pekruhn | 1994-11-15 |
| 5158929 | Inking ribbon | Ferdinand Quella, Wolfgang Pekruhn, Oskar Nuyken, Barbara Dorner | 1992-10-27 |
| 4778989 | Scanning device for microline-by-microline illumination and optically scanning a planar original | Friedrich Hagemayer, Peter Hamann, Wolfgang Meye | 1988-10-18 |
| 4756633 | Inking ribbon including a sublimable release layer for color transfer under the influence of heat | Friedrich-Wilhelm Drees, Friedrich-Wilhelm Hagemeyer, Wolfgang Pekruhn | 1988-07-12 |
| 4743410 | Method for manufacturing a flat illumination unit | Werner Nickel, Udo Scheer | 1988-05-10 |