Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8841365 | Method for transporting straight run bitumen, and bitumen mixture | Bertram Haupt | 2014-09-23 |
| 8034854 | Bitumen mixture and use thereof | — | 2011-10-11 |
| 5088249 | Roof covering or wall covering | — | 1992-02-18 |
| 4411115 | Spacer frames for multi-pane glazing units | Bernd Schweisser | 1983-10-25 |
| 4294733 | Adhesive for double glazing units | Bernd Schwisser | 1981-10-13 |
| 4268553 | Method for double glazing units | Bernd Schweisser | 1981-05-19 |