Worlds, Inc. was using two Activision-owned patents in its Worlds Player software, but this suit was dismissed with prejudice by June 2014. In Worlds, Inc. case against Activision, the judge issued a summary judgement in Activision's favor, as they had demonstrated that Worlds, Inc. had demonstrated the technologies of their patents in their client programs AlphaWorld and World Chat, released before the 1995 priority date, though this was related to filing irregularities that were subsequently corrected by the Patent Office. Activision did not challenge the updated patents through an inter partes review (IPR), and subsequently after a statutory one-year waiting period, Worlds, Inc. filed a subsequently lawsuit against Activision, asserting Call of Duty: Ghosts violated their resolved patents. Later, Worlds, Inc. stated the intent to add Bungie to the lawsuit contending that Destiny also fell afoul of their patents. Bungie subsequently filed three IPRs with the Patent Office for each of the three Worlds, Inc. patents at the core of the lawsuit. While Bungie initially won its IPR ruling at the USPTO, on appeal in September 2018, Worlds, Inc. won a ruling questioning whether Bungie had legal standing to file its IPRs. The new Worlds, Inc. case against Activision Blizzard was heard on October 3, 2014. With Bungie's IPRs pending at the Patent Office, the judge put the trial on hold pending the outcome of the IPRs. Worlds, Inc. challenged the IPRs at the Patent Office, as they did not include Activision as an interested party, a requirement that would have been necessary given the publisher/developer relationship between Activision and Bungie. The Patent Office did not accept this argument, and subsequently agreed with the Bungie IPRs that portions of Worlds, Inc. patents were invalid. Worlds, Inc. appealed to the Federal Circuit Appeals Court, challenging the validity of the IPRs due to the lack of Activision's involvement. The Federal Circuit court ruled in favor of Worlds, Inc. in September 2018, invalidating the Patent Office's decision. Worlds, Inc.'s case presently remains at the Patent Office stage, which is re-reviewing the IPRs in consideration of the Federal Circuit's ruling. The lawsuit was dismissed in 2021, when a US district court ruled that "Worlds' patents were abstract ideas that were not sufficiently transformative to be legally patentable." Infinity Ward In early 2010, Activision fired Vince Zampella and Jason West, two of the founders of its studio Infinity Ward, on the basis of "breaches of