Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6818055 | Porous silicate granular material and method for producing it | — | 2004-11-16 |
| 4397668 | Process and devices for hardening of glassware by ion exchange | Dieter Patzig, Klaus Heinrich, Bernd Gruger | 1983-08-09 |