Citing Traxcell Technologies, LLC’s accusations in a case filed against AT&T in the same jurisdiction last October, Telenav has asked the Eastern District of Texas for a declaratory judgment that it does not infringe one of the four patents earlier asserted. Telenav notes that the NPE accused the AT&T Navigator app of infringing the patent, which generally relates to a system for maintaining the expected performance of a wireless network based on the location of mobile devices. AT&T Navigator is a Telenav product, prompting AT&T to seek indemnification. Traxcell has filed this campaign in two waves, one in January 2017 against device makers and the other in October 2017 against wireless carriers, the former resulting in extensive motion practice over the sufficiency of Traxcell’s infringement contentions that led to sanctions against the plaintiff.