We previously reported that Lucent sued Microsoft, alleging that the Xbox 360 infringes one of Lucent’s patents. Earlier this week Microsoft filed a counterclaim, accusing Lucent of infringing various Microsoft patents, as well as challenging the validity of the Lucent patent at issue. We will keep you posted as this case progresses.

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Case: Marvel Ent. v. NCSoft Corp. (Settled 2005)
Case: Ebay v. Mercexchange (2006) - Patents