Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4649502 | Process and apparatus for evaluating printing quality and for regulating the ink feed controls in an offset printing machine | Guido Keller, Andreas Spiess, Hans Ott | 1987-03-10 |
| 4505589 | Process and apparatus for the colorimetric analysis of printed material | Hans Ott, Ulrich Birch, Helmut Kipphan, Gerhard Loffler | 1985-03-19 |