Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4530818 | Transparent fused silica bell for purposes relating to semiconductor technology | Alfons Gutermann, Heinz Herzog, Karl A. Schulke | 1985-07-23 |
| 4340627 | Wound and sintered vitreous silica article and method of making | Heinz Herzog, Karl A. Schulke, Holger Grzybowski | 1982-07-20 |