Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5526580 | Method and heat-exchanger for preheating broken glass and glass-batching melt-goods or similar bulk goods using a heating gas | Erich Weis, Hilmar Leichtenschlag | 1996-06-18 |
| 5412882 | Method and heat-exchanger for preheating broken glass and glass-batching melt-goods or similar bulk goods using a heating gas | Erich Weis, Hilmar Leichtenschlag | 1995-05-09 |