Late last year, Samsung asked the Northern District of California to enforce a covenant not to sue granted to it by Longhorn IP LLC, which Samsung contends covers three patents that TSMC subsequently assigned to Trenchant Blade Technologies, LLC. The parties stipulated to an extension of the deadline, to January 27, for the defendants to answer or otherwise respond to Samsung’s complaint. Trenchant Blade has now responded, of a sort, by filing a new Western District of Texas complaint (6:21-cv-00067) charging Samsung with infringement of the same three former TSMC patents.