The most highly anticipated case in the fashion world in 2012 was Christian Louboutin v Yves St Laurent, in which footwear designer Christian Louboutin sued design house Yves St Laurent over footwear incorporating a red sole, claiming that it infringed Louboutin's trade mark registration covering a lacquered red sole on footwear. An April ruling by the USPTO finally put an end to this case, the net impact of which may be more noteworthy not for the questions it answered but for the questions that it left open.