Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4575249 | Method and device for measuring the density of color layers of printing inks that are still wet | — | 1986-03-11 |
| 4393295 | Apparatus and method for engraving with an electron beam | Siegfried Beisswenger, Wolfgang Boppel | 1983-07-12 |
| 4317982 | Orifice for coupling an electron beam gun to print form cylinders | Heinz Taudt, Siegfried Beisswenger | 1982-03-02 |