Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5445661 | Melting end for glass melting furnaces with soldier blocks and operating process therefor | — | 1995-08-29 |
| 4687504 | Glass melting furnace with bottom electrodes | Helmut Pieper, Helmut Sorg | 1987-08-18 |