Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703249 | Bicycloaliphatic 2-methylene-1,3-dioxepanes | Norbert Moszner, Ulrich Salz, Thomas Voelkel | 1997-12-30 |
| 5698019 | Leucite-containing phosphosilicate glass-ceramic | Martin Frank, Marcel Schweiger, Wolfram Hoeland | 1997-12-16 |
| 5698020 | Photochromic dental material | Ulrich Salz, Peter Burtscher, Heinz Durr | 1997-12-16 |
| 5698482 | ZrO.sub.2 - containing glass-ceramic | Martin Frank, Wolfram Hoeland | 1997-12-16 |
| 5618763 | Alkali-zinc-silicate glass-ceramics and glasses | Martin Frank, Susanne Wegner, Wolfram Hoeland | 1997-04-08 |