Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6100004 | Radiation-sensitive mixture and recording material made thereof for offset printing plates | Andreas Elsaesser, Otfried Gaschler, Helmut Haberhauer, Mathias Eichhorn, Fritz-Feo Grabley +2 more | 2000-08-08 |
| 5686221 | Negative working peel apart color proofing process | — | 1997-11-11 |
| 5660968 | Negative working, peel developeable, single sheet color proofing system with improved background color | Wojciech A. Wilczak | 1997-08-26 |
| 5039590 | Coating positive or negative working color proofing system | Stephan J. W. Platzer | 1991-08-13 |
| 4948693 | Positive working color proofing system comprising polyvinyl acetal/polyvinyl alcohol/polyvinyl acetate resin | Richard L. Shadrach, Stephan J. W. Platzer | 1990-08-14 |
| 4772533 | Positive working naphthoquinone diazide color proofing element with polyvinyl acetate adhesive layer | Stephan J. W. Platzer, Richard L. Shadrach | 1988-09-20 |
| 4751166 | Negative working diazo color proofing method | Stephan J. W. Platzer | 1988-06-14 |
| 4670507 | Resin | John E. Walls, Major S. Dhillon | 1987-06-02 |
| 4665124 | Resin | John E. Walls, Major S. Dhillon | 1987-05-12 |
| 4659642 | Positive working naphthoquinone diazide color proofing transfer process | Stephan J. W. Platzer, Richard L. Shadrach | 1987-04-21 |
| 4650738 | Negative working diazo color proofing method | Stephan J. W. Platzer | 1987-03-17 |