On January 20 , the General Court issued a decision in respect of a Community design registration for a heat exchanger. This heat exchanger to which the contested design was applied was presented as a part of a complex product, namely a household boiler. A direct competitor of the applicant filed a claim with OHIM to declare the design invalid, on the ground that the design as registered did not remain visible after its installation in the boiler, and therefore did not constitute a valid design in the sense of the Regulation.