Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6989633 | Alkaline-earth aluminosilicate glass, containing CA and BA, suitable for use in lamp bulbs, and a lamp bulb containing same | Christian Kunert, Karin Naumann, Franz Ott | 2006-01-24 |
| 6373193 | Long life halogen cycle incandescent lamp and glass envelope composition | Richard C. Marlor, Karin Naumann, Franz Ott | 2002-04-16 |
| 6043171 | Lead-free and cadmium-free glass compositions for glazing, enameling and decorating glass of glass-ceramics | Friedrich Siebers, Waldemar Weinberg, Petra Auchter-Krummel | 2000-03-28 |