Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6660671 | Method of producing a composite material having a high SiO2 content, composite material obtained according to the method, and permanent mold made thereof | Waltraud Werdecker, Udo Gertig, Johann Leist | 2003-12-09 |