Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6450476 | Formwork for producing articles of concrete | Christian Hassmann, Jürg Hausser | 2002-09-17 |
| 5820775 | Textile sheet for use as a concrete mold liner | Stefanie Hiller, Christian Hassmann | 1998-10-13 |
| 5104594 | Drying the surface of a fresh concrete body | Bernd Hillemeier, Claus Flohrer | 1992-04-14 |