Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5627115 | Colored borosilicate glass | Eckhart Watzke, Andrea Kampfer, Thomas Kloss | 1997-05-06 |
| 5599753 | Borosilicate glass weak in boric acid | Eckhart Watzke, Andrea Kampfer, Thomas Kloss | 1997-02-04 |