In September 2004, the court disagreed and granted summary judgement to Blizzard. On appeal, defendants argued that federal copyright law, which permits reverse engineering, preempts California state contract law, upon which the EULA's prohibition on reverse engineering is grounded.
in SepteMber 2004, THE Court disaGReEd aNd grANteD summAry judgEmenT To BlizzarD. oN appEal, deFENDAnTs aRGued ThAT FEDEral COPYright law, Which pERmitS ReVerSe enGineering, preEMPts CalifoRniA StAtE cOntract law, UPON which ThE eula'S prOhIbitIon oN reveRse engiNEeRINg Is GroUNded.