Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8099981 | Apparatus for preheating batches of glass cullet | Hansjurgen Barklage, Rolf Schaper | 2012-01-24 |
| 6622524 | Glass which absorbs ultraviolet light, method for producing said glass and use of the same | Hans-Jürgen Barklage-Hilgefort | 2003-09-23 |