Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5261930 | Polycrystalline, sintered abrasive granules based on .alpha.-Al.sub.2 O.sub . | Christine Fliedner, Dietrich Maschmeyer | 1993-11-16 |
| 4513089 | Superrefractory dry ramming material based on zirconium oxide for the lining of induction-type crucible furnaces | Peter Kummer | 1985-04-23 |
| 4472961 | Apparatus for testing abrasive grains in single-grit scratch tests | Klaus-Jurgen Steffens | 1984-09-25 |
| 4472173 | Ceramic-coated corundum abrasive grain | Klaus Bruning | 1984-09-18 |