Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6360563 | Process for the manufacture of quartz glass granulate | Rolf Gerhardt, Rainer Köppler, Waltraud Werdecker | 2002-03-26 |
| 5637284 | Process for continuous refining of quartz powder | Tatsuhiro Sato, Hiroyuki Watanabe | 1997-06-10 |