Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872897 | Bottom tap of a glass melting furnace and method of operating the same | Rudi Kessel | 1989-10-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872897 | Bottom tap of a glass melting furnace and method of operating the same | Rudi Kessel | 1989-10-10 |