Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5643347 | Process for manufacture of silica granules | Waltraud Werdecker, Rolf Gerhardt, Wolfgang Englisch | 1997-07-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5643347 | Process for manufacture of silica granules | Waltraud Werdecker, Rolf Gerhardt, Wolfgang Englisch | 1997-07-01 |