Salazar v. AT&T, Inc., 2:17-cv-00593

Plaintiff Joe Andrew Salazar sued HTC Corporation alleging infringement of U.S. Patent No. 5,802,467 based on accused mobile phones; case filed in E.D. Tex. in October 2016.
Salazar amended (final day to join parties) to add AT&T, Inc. as a defendant; later acknowledged the proper retail defendant is AT&T Mobility and moved to substitute.
HTC moved to sever and stay claims against AT&T, arguing misjoinder under 35 U.S.C. § 299 and prejudice/delay to AT&T’s participation in claim construction.
AT&T (and HTC) contended AT&T, as a holding company/retailer, lacks transactional connection to HTC and was added late, apparently to influence venue.
Court found no transactions connecting HTC and AT&T as required by § 299, Salazar had not adequately researched or pled allegations specific to AT&T, and AT&T had no meaningful opportunity to participate in claim construction given approaching deadlines.
Court granted motion: severed and stayed claims against AT&T, transferred certain motions to the new cause, and denied AT&T’s emergency stay as moot.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether multiple accused infringers properly joined under 35 U.S.C. § 299	Salazar sought to correct pleading to name AT&T Mobility; argues severance is unfair/inefficient	HTC/AT&T: AT&T (holding co.) is misjoined; no transactions linking HTC and AT&T; addition was late and peripheral	Court: AT&T misjoined; no transactions connect HTC and AT&T; claims severed and stayed
Whether severance/stay is warranted for fairness, prejudice, or delay	Salazar: severance is inappropriate and inefficient; prefers single proceeding	Defendants: Sever/stay required because AT&T cannot meaningfully participate in imminent claim construction and would be prejudiced	Court: Stay/severance warranted to avoid prejudice and protect fairness
Whether Plaintiff timely and adequately identified the proper defendant	Salazar: moved to substitute AT&T Mobility after discovering evidence	Defendants: Plaintiff added wrong defendant at last moment without adequate research; allegations against AT&T are cursory	Court: Plaintiff unprepared; timing and lack of AT&T-specific allegations weigh for severance
Effect on judicial economy and scheduling	Salazar: single case is more efficient	Defendants: forcing AT&T into current schedule would compress its participation or delay proceedings	Court: Judicial economy considered but prejudice to AT&T and fairness justify severance and stay

Connectel, LLC v. Cisco Sys., 391 F. Supp. 2d 526 (E.D. Tex. 2005) (plaintiffs expected to thoroughly analyze public information before filing patent suits)
Am. Video Graphics, L.P. v. Elec. Arts, Inc., 359 F. Supp. 2d 558 (E.D. Tex. 2005) (patent rules reflect high expectations of plaintiffs’ preparedness before suit)