Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6239053 | Large format fireclay refractory block and method of producing the same | Hans Petschauer | 2001-05-29 |
| 4618538 | Colored enamel composition for obtaining decorative layers of float glass sheets | Heinfried Emonts | 1986-10-21 |