Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5635429 | Method of making a substrate of a ceramic material | Wilhelm A. Grogen, Paulus F. Van Hal, Gijsbertus De With | 1997-06-03 |
| 5571757 | Substrate of a ceramic material | Wihelm Albert Groen, Paulus F. Van Hal, Gijsbertus De With | 1996-11-05 |
| 5411924 | Ceramic body | Wilhelm A. Groen, Gijsbertus De With | 1995-05-02 |