| 1981 |
Construction of the first telescopic trash rack cleaner. |
| 1983 |
Construction of the first hydraulic trash rack cleaner with articulating boom. |
| 1985 |
Construction of the first mobile, hydraulic trash rack cleaner. |
| 1988 |
Construction of the first hydraulic trash rack cleaner with more than 10 m cleaning width. |
| 1989 |
Patent application and construction of the hydraulic, underwater trash rack cleaner. |
| 1993 |
Construction of the first trash rack cleaner of type HYDRONIC R. |
| 1994 |
Construction of the first hydraulic trash rack cleaner with more than 10 m cleaning depth. |
