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One Plaintiff, One Patent, One Supplier, but Three Wireless Carriers

June 2, 2023

Dali Wireless Inc. has filed another trio of lawsuits, one against each of AT&T (AT&T Mobility) (2:23-cv-00246), Deutsche Telekom (T-Mobile) (2:23-cv-00247), and Verizon (Verizon Wireless) (2:23-cv-00245), each together with codefendant CommScope, all in the Eastern District of Texas. A single patent, familiar to the campaign and generally related to a distributed antenna system, is asserted in each complaint. For the past several years, this campaign has seen a dizzying array of cases naming as defendants these three wireless carriers (AT&T Mobility, T-Mobile, and Verizon Wireless) as well as one or more their alleged suppliers: CommScope, Corning, and/or Ericsson. An appeal from a stipulated final judgment of noninfringement in CommScope’s favor before the District of Delaware (based on certain claim constructions) is nearing oral argument before the Federal Circuit, while the appeal from a Northern District of California summary judgment of noninfringement in Corning’s favor is just getting started. Meanwhile, a stay in an earlier Texas case suggests that Dali Wireless and Ericsson are close to a settlement.


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