Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6357800 | Document with a moire-generating raster structure | Johann Muller | 2002-03-19 |
| 4659113 | Method of screening half-tone picture themes | Hans E. Muller | 1987-04-21 |
| 4557596 | Method of screening half-tone picture themes | Hans E. Muller | 1985-12-10 |
| 4513992 | Data carrier having a picture theme superimposed by a line pattern and a method of producing same | Hans E. Muller | 1985-04-30 |
| 4459020 | Data carrier having a picture theme superimposed by a line pattern and a method of producing same | Hans E. Muller | 1984-07-10 |