Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5296027 | Single-component alkali metal silicate cement composition | Josef Ernst, Peter Wirtz | 1994-03-22 |
HS
Hans-Joachim Semmler
Overall (1994): #128,291 of 165,921Top 80%
1
Patents 1994