Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5016099 | Process for determining the optical quality of flat glass or flat glass products | Wolfgang Bongardt, Hans-Josef Winkeler, Josef Schneiders | 1991-05-14 |
| 4421541 | Process and device for the manufacture of glass by flotation | Gaston Eischen, Thomas Eulenberg, Rainer Grablowitz, Michel Pernet | 1983-12-20 |