Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4892498 | Process for vacuum-tight sealing of a ceramic tube | Klaus Popp | 1990-01-09 |
| 4725467 | Polycrystalline, translucent sintered tubes | Heinrich Groh | 1988-02-16 |
| 4629593 | Process for producing polycrystalline, translucent sintered tubes | Heinrich Groh | 1986-12-16 |