Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698019 | Leucite-containing phosphosilicate glass-ceramic | Martin Frank, Marcel Schweiger, Volker Rheinberger | 1997-12-16 |
| 5698482 | ZrO.sub.2 - containing glass-ceramic | Martin Frank, Volker Rheinberger | 1997-12-16 |
| 5618763 | Alkali-zinc-silicate glass-ceramics and glasses | Martin Frank, Susanne Wegner, Volker Rheinberger | 1997-04-08 |