In a preliminary injunction proceeding between Hilti AG and Milwaukee Corp, Hilti alleged that its Austrian mark for the colour red (RAL 3020) for "cases for hammer drills" and its three-dimensional Community trade mark for a red case for the same goods were infringed. The colour mark and the three-dimensional mark were registered following the filing of proof that the interested circles recognised the marks as an indication of origin (secondary meaning). Milwaukee sells sets of tools, including hammer drills, in red cases.