Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667547 | Method for manufacture of quartz glass plates | Anton Steinkohl | 1997-09-16 |
| 5665132 | Process for the sintering of hollow cylinders of silicon dioxide soot | Klaus Ruppert, Michael Hünermann, Klaus Dittmer, Anton Steinkohl | 1997-09-09 |
| 5665139 | Mold for production of a quartz glass component | Klaus Ruppert, Klaus Dittmer | 1997-09-09 |
| 5643069 | Drill for drilling brittle materials | Dagobert Knieling, Andreas Schultheis | 1997-07-01 |