Willis Electric Co., Ltd. v. Polygroup Limited

Background

Willis Electric brought this patent-infringement action in 2015, alleging that Polygroup infringed several patents. The only claim tried to the jury was claim 15 of U.S. Patent No. 8,454,186, which concerns an artificial holiday tree with multiple trunk segments, internal wiring, and coaxial couplings supplying power to lights. Polygroup defended on non-infringement and invalidity grounds.

The jury trial began on January 8, 2024. On January 17, 2024, the jury unanimously found that Polygroup willfully infringed claim 15 and awarded Willis Electric $42,494,772 in damages. On March 11, 2024, the Court entered judgment against Polygroup for more than $71.4 million, including prejudgment interest. After trial, Polygroup moved for judgment as a matter of law, a new trial, or remittitur, and Willis Electric moved for attorneys’ fees.

Polygroup’s Post-Trial Motion

A motion for judgment as a matter of law asks the court to overturn a jury’s verdict when no reasonable jury had a legally sufficient evidentiary basis for reaching it. The Court explained that it had to view the evidence favorably to Willis Electric and could not reweigh evidence or decide which witnesses were more credible. A new trial was warranted only if the verdict was against the great weight of the evidence, resulted from legal error or prejudice, or otherwise caused a miscarriage of justice. Remittitur, which reduces a damages award, was available only if the award was grossly excessive, unsupported by the evidence, speculative, or shocking to the conscience.

Invalidity and Obviousness

Polygroup argued that claim 15 was invalid as obvious under 35 U.S.C. § 103. Its principal argument was that a person having ordinary skill in the field would have been motivated to modify the prior-art GKI tree to use coaxial connectors for powering light-emitting diode lights.

The Court found that the jury could reasonably credit Willis Electric’s expert, Dr. James Dickens, who testified that the GKI tree’s two-prong connectors were tied to an alignment feature and that replacing them with coaxial connectors would require eliminating that feature and substantially redesigning the connector housings. Polygroup’s expert, Dr. John Martens, did not directly address those design issues in detail. The Court therefore held that substantial evidence supported the jury’s finding that a skilled artisan would not have been motivated to make the proposed combination.

The Court gave little weight to Willis Electric’s evidence of commercial success, industry praise, and copying because Willis Electric did not establish a sufficient connection between that evidence and claim 15’s specific coaxial-connector features. The Court also noted that Willis Electric presented no evidence of unexpected results from using coaxial connectors in artificial trees. Even so, the Court concluded that Polygroup had not proved obviousness as a matter of law and denied its renewed motion for judgment as a matter of law on obviousness.

New Trial on Invalidity

Polygroup argued that Willis Electric had presented an unfairly one-sided account of the ’186 Patent’s prosecution history and had made prejudicial arguments about the Patent Office’s consideration of prior art. The Court found no basis for a new trial. It concluded that Polygroup had opened the door to prosecution-history evidence, had a fair opportunity to present its position, and had not shown that the jury was misled about the presumption of validity or the clear-and-convincing-evidence standard.

Polygroup also challenged Willis Electric’s references to the patent as “gold plated” and its description of the burden of proof as nearly equivalent to the criminal reasonable-doubt standard. The Court found those statements isolated or inapt but not sufficiently prejudicial to deny Polygroup a fair trial. Polygroup’s failure to object to the arguments during trial further weakened its request for a new trial. The Court denied Polygroup’s alternative motion for a new trial on invalidity.

Infringement

Polygroup challenged the Court’s construction, or legal interpretation, of two claim terms. For “independent of,” the Court had construed the claim to require an electrical connection that could be made at any available rotational arrangement of the tree sections, without requiring the connection to remain intact while the sections were rotated. The Court declined to change that construction.

For “coupling,” the Court had applied the term’s plain and ordinary meaning. It rejected Polygroup’s argument that coupling required the trunk ends to be in direct physical contact. The Court explained that intervening components, such as connector assemblies, could connect the trunk portions even if the ends did not directly touch.

Applying those constructions, the Court found substantial evidence supporting the jury’s infringement verdict. Dr. Dickens provided a limitation-by-limitation analysis explaining how the accused products met the claim requirements, including the rotationally independent electrical connection and the coupling limitation. The Court concluded that Polygroup’s contrary arguments relied on narrower constructions the Court had rejected and on credibility judgments the Court could not make on a post-trial motion.

Polygroup also argued that Polygroup Macau could not be liable because it was only a holding company. The Court found evidence from which a jury could conclude that Polygroup Macau participated directly or indirectly in infringing activities. The Court therefore denied Polygroup’s motion for judgment as a matter of law on non-infringement and concluded that substantial evidence supported the verdict that all accused Polygroup products and entities infringed claim 15.

Damages and Remittitur

Polygroup argued that Willis Electric’s damages expert, Michele Riley, failed to separate the value of the patented coaxial-connector feature from the value of the artificial trees’ other features. The Court found that Riley used income-based and market-based approaches that made a serious effort to apportion the value of the patented technology. Any weaknesses in her methodology went to the weight of her testimony, not its legal sufficiency.

Polygroup also challenged the comparability of the license agreements Riley considered, including a license covering the ’186 Patent and several other patents. The Court acknowledged shortcomings in Riley’s explanation of some differences but concluded that the license evidence was not so unreliable that it invalidated the damages analysis. Polygroup had the opportunity to cross-examine Riley and present contrary expert testimony.

The Court rejected Polygroup’s arguments that the jury’s $4-per-unit royalty was an improper disgorgement of profits and that Willis Electric had failed to comply with the patent-marking statute. The Court found largely unrebutted evidence that Willis Electric marked its products with the ’186 Patent number beginning when the patent issued in June 2013. The Court also found that potentially improper comments by Willis Electric’s counsel about Polygroup’s nationality and business practices were isolated, were not shown to have influenced the verdict, and were not sufficiently prejudicial to require a new trial.

The Court concluded that the $4-per-unit royalty and the overall damages award were supported by substantial evidence and did not shock the conscience. It denied Polygroup’s motion for a new trial or remittitur on damages.

Willfulness

The Court separately upheld the jury’s finding of willful infringement. It found substantial evidence that Polygroup knew about the ’186 Patent and Willis Electric’s infringement allegations but continued selling the accused products without developing or documenting good-faith non-infringement positions. The Court concluded that the jury could discount contrary testimony from Polygroup’s engineers and denied judgment as a matter of law and a new trial on willfulness.

Attorneys’ Fees

Under 35 U.S.C. § 285, a court may award reasonable attorneys’ fees to the prevailing party in an “exceptional” patent case. The Court explained that an exceptional case is one that stands out because of the strength of a party’s position or the unreasonable way the case was litigated. A willfulness finding may be considered but does not automatically require a fee award.

Willis Electric argued that the jury’s willfulness finding, the weakness of Polygroup’s positions, and alleged litigation misconduct made the case exceptional. The Court disagreed. It noted that Polygroup had succeeded in invalidating many asserted claims and obtaining summary judgment of non-infringement on several others, which indicated that its defenses were not objectively baseless. The Court also found no extraordinary litigation misconduct and noted that it had previously denied enhanced damages.

The Court concluded that the case was not exceptional and denied Willis Electric’s motion for attorneys’ fees and non-taxable costs. The Court stated that, even if the case had been exceptional, any fee award would have required apportionment based on the one claim on which Willis Electric prevailed, would have excluded expert fees under Section 285, and would have required a detailed itemized accounting.

Disposition

The Court denied Polygroup Limited (Macao Commercial Offshore), Polygroup Macau Limited (BVI), Polytree (H.K.) Co. Ltd., and Polygroup Trading Limited’s motion for judgment as a matter of law, a new trial, or remittitur. The Court also denied Willis Electric Co., Ltd.’s motion for attorneys’ fees.