TEXARKANA, TX (LN) — U.S. District Judge Rodney Gilstrap ruled Thursday that Headwater Research LLC’s silence and strategic delay in suing Verizon Wireless barred enforcement of its patents under the doctrine of implied waiver, preventing the patent holder from collecting on a $175 million jury verdict for willful infringement.
The ruling addresses the interplay between equitable estoppel and waiver of the Supreme Court’s decision in SCA Hygiene, which eliminated laches as a defense to damages in patent cases. Gilstrap distinguished implied waiver from laches, finding that Headwater’s conduct went beyond mere delay and actively induced Verizon to believe it could continue using the technology without fear of enforcement.
Headwater sued Verizon on July 28, 2023, for infringing two patents related to background data technologies. A jury found the infringement willful and awarded $175 million in damages. However, the dispute centered on equitable defenses raised by Verizon, which argued that Headwater had waived its right to enforce the patents through its conduct.
Verizon had invested in Headwater and its sister entity, ItsOn Inc., starting in 2010. The carrier argued that these investments, along with representations in investment agreements that no suits were pending, led it to reasonably infer that Headwater did not intend to enforce its patents against Verizon.
Gilstrap rejected the equitable estoppel claim based on those investments. He found that Verizon’s belief that it could infringe Headwater’s patents solely because of its equity stake was unreasonable. Furthermore, the 2010 investment agreement expressly permitted Headwater to withhold information about potential infringement claims to avoid conflicts of interest.
The court’s analysis shifted to Headwater’s conduct after its 2017 investigation into Verizon’s infringement. Gilstrap found that Headwater had full knowledge of the infringement as early as 2017 but waited until 2023 to file suit.
“The Court finds that Headwater’s delay in filing suit is directly attributable to maximizing the damages it could recover,” Gilstrap wrote. “In other words, the Court finds that Headwater had full knowledge of Verizon’s infringement in 2017.”
By waiting six years, Headwater was able to seek damages for the entire six-year period permitted under 35 U.S.C. § 286, rather than the less than two years available if it had sued in 2017. Gilstrap described this as “conduct done with unclean hands,” noting that Headwater and its principal, Dr. Gregory Raleigh, “consciously delayed litigation against Verizon purely to benefit themselves.”
The judge ruled that this delay induced a reasonable belief in Verizon that Headwater had waived its right to enforce the patents. Verizon could reasonably believe that Headwater would have sued sooner if it intended to enforce its rights, or that it had decided not to sue at all.
Gilstrap addressed the impact of SCA Hygiene, which held that laches cannot bar damages in patent cases. He distinguished implied waiver from laches, stating that the “gravamen” of implied waiver is the inducement of a reasonable belief, not just the passage of time.
“The Court finds that SCA Hygiene does not preclude the equitable relief under implied waiver which the Court issues here,” Gilstrap wrote. “Given that the Court finds equitable relief proper under the doctrine of implied waiver as to the issue of Verizon’s liability, and not damages alone, SCA Hygiene does not teach away the Court now orders.”
The court found that Verizon was deprived of the opportunity to seek and implement non-infringing alternatives during the six-year delay. Headwater’s “calculated delay prevented Verizon from pursuing such alternatives while the damages clock, visible only to Headwater, continued to run.”
Gilstrap concluded that Headwater could not enforce the asserted patents against Verizon under the doctrine of implied waiver.
Headwater’s attorney, Jeffrey Johnson, appeared pro se in the case.