# United States **Court of Appeals**  **for the Federal Circuit**

______________________ SIONYX LLC, PRESIDENT AND FELLOWS OF HARVARD COLLEGE, Plaintiffs

- Cross

- Appellants

v.

HAMAMATSU PHOTONICS K.K., HAMAMATSU CORPORATION, Defendants

- Appellants

DOES 1

- 10,

Defendant

______________________

2019

- 2359, 2020

- 1217

______________________ Appeals from the United States District Court for the District of Massachusetts in No. 1:15

- cv

- 13488

- FDS, Judge F. Dennis Saylor IV.

______________________
Decided: Dec ember 7 , 2020

______________________
W ILLIAM D. B ELANGER , Troutman Pepper Hamilton Sanders LLP, Boston, MA, argued for plaintiffs

- cross

- appellants. Also represented by A NTHONY H. C ATALDO , G WENDOLYN T AWRESEY

.

J OHN D AVID S IMMONS , Panitch Schwarze Belisario & Nadel LLP, Philadelphia, PA, argued for defendants

Case: 19-2359 Document: 58 Page: 1 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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appellants. Also represented by K EITH A ARON J ONES , S TEPHEN E MERSON M URRAY ; K OICHIRO M INAMINO , Minamino Law Office, PLLC, Washington, DC.

______________________
Before L OURIE , R EYNA , and W ALLACH , Circuit Judges

. L OURIE , Circuit Judge

.Hamamatsu Photonics K.K. and Hamamatsu Corporation (“Hamamatsu”) appeal from the judgment of the U.S. District Court for the District of Massachusetts after a jury verdict that (1) Hamamatsu breached its Non

- Disclosure Agreement (“NDA”) with SiOnyx LLC (“SiOnyx”); (2) Hamamatsu willfully infringed U.S

. Patent 8,080,467 (“the ’467 patent”) ; (3) SiOnyx is entitled to $796,469 in damages

a nd $1,091,481 of pre

- judgment interes t for breach of the NDA ; (4) SiOnyx is entitled to $580,640 in damages and $660,536 of pre

- judgment interest for unjust enrichment; (5) SiOnyx is entitled to post

- judgment interest at the statutory rate for its breach of contract and unjust enrichment claims; ( 6 ) Dr. James Carey is a co

- inventor of U.S. Patents 9,614,109; 9,293,499; 9,190,551; 8,994,135; 8,916,945; 8,884,226; 8,742,528; 8,629,48 5; and 8,564,087 (collectively “the Disputed U.S. Patents”) ; ( 7 ) SiOnyx is entitled to sole ownership of the Disputed U.S. Patents; ( 8 ) SiOnyx is entitled to an injunction prohibiting Hamamatsu from practicing the Disputed U.S. P atents for breach of the ND A; and ( 9 ) SiOnyx is entitled to an injunction prohibiting Hamamatsu from practicing the ’467 patent for infringement. See SiOnyx, LLC v. Hamamatsu Photonics K.K

. , No. 1: 15

-
cv

- 13488

- FDS ( D. Mass. Sep t . 24, 2019), ECF No. 834.

S iOnyx cross

- appeals from the district court’s decisions (1) denying SiOnyx sole ownership of the Japanese patent applications from which the Disputed U.S. P atents claim priority and all other foreign patents claiming priority from the Japanese applications (collectively “the Disputed Case: 19-2359 Document: 58 Page: 2 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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Foreign Patents”) ; and (2) denying SiOnyx’s motion f or fees under 35 U.S.C. § 285.Because the district court erred in failing to grant SiOnyx sole ownership of the Disputed Foreign Patents , we reverse the district court’s deni al of SiOnyx’s motion to compel Hamamatsu to transfer ownership of those patents to SiOnyx. We decline to address the issue of willfulness and affirm the district court’s judgment in all other respects.

B ACKGROUND

T his appeal arises from research conducte d at Harvard University by Professor Eric Mazur and his then

- studentJames Carey. In 1998, Mazur discovered a process for creating “black silicon” by irradiating a silicon surface with ultra

- short laser pulses. In addition to turning the silicon black, t he process creates a textured surfac e, and the resulting black silicon has electronic properties different from traditional silicon

. After discovering the process for making the material, Mazur worked with his students, including Carey, to study its properties and potential uses. Based on their work, Mazur and Carey filed U.S. Prov isional Pat ent App lication 60/293,590 on May 25, 2001, from which several patents eventually issued , including the ’467 patent.

I. T HE P ARTIES ’ R ELATIONSHIPAround 2005, Mazur and Carey founded SiOnyx to further develop and commercialize black silicon. Thereafter, SiOnyx sought to establish relationships with companies that may be interested in its technology. I n November 2006, SiOnyx met with Hamamatsu, which produces, among other things, silicon

- based photodetector devices. SiOnyx gave a brief presentation on the discovery of black silicon and, on January 11, 2007, SiOnyx and Hamamatsu entered into the NDA to allow the parties to share confidential information relat ing to “evaluating applications Case: 19-2359 Document: 58 Page: 3 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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and joint [] development opportunities of pulsed laser process doped photonic devices.” J.A. 2881.
The NDA includes several provisions that are relevant to this appeal . First, the NDA provides that a party receiving confidential information (as defined in the agreement) shall maintain the information in strict confidence for

seven years after the expiration of the agreement , after which the receiving party may use or d isclose the confidential information. J.A. 2881

– 82 ¶¶ 2, 8. Second, the agreement provides that a party receiving confidential information acknowledges that the disclosing party claims ownership of the information and all patent rights “in, or arising fr om” the information. J.A. 2882 ¶ 5. Finally , theagreement requires a party receiving confidential information to return all confidential information within 30 days of the termination of the agreement. Id . ¶ 7.

While the NDA was in effect

, SiOnyx provid ed to Hamamatsu proposed architectures and a manufacturing process for a photodetector device, which w ere marked as confidential. Hamamatsu and SiOnyx worked together to produce experimental devices using SiOnyx’s process. Hamamatsu produced silicon wafers as it would to manufacture its traditional photodiodes, which were then sent to SiOnyx to perform SiOnyx’s laser

- texturing process. The textured wafers were then returned to Hamamatsu to be cut, packaged, and tested. T he sample devices produced favorable results, but Hamamatsu represented that itwished to develop its products alone “without further reference to proprietary information of SiOnyx

, ” and the NDA expired on January 12, 2008. J.A. 3013. After expiration of the NDA, SiOnyx did not request that Hamamatsu return any confidential information received from SiOnyx

, and Hamamatsu did not do so

. After the NDA was terminated, Hamamatsu continued to develop new photodetector devices. On February 1, 2008, as part of its work developing a new commercial Case: 19-2359 Document: 58 Page: 4 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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photodiode, Hamamatsu prepared an internal development report that referred to the prototype work done with SiOnyx. On February 9, 2009, Hamamatsu emailed SiO ny x to inform SiOnyx that Hamamatsu intended to introduce a new photodiode at its Photon Fair exhibition that included a “ black silicon surface fabricated by laser .” J.A. 3011. The email included a cross

- sectional diagram of the structure of the photodiode and a performance curve. Hamamatsu stated that it did no t believe that the new product infringed SiOnyx’s intellectual property or breach ed Hamamatsu’s confidentiality obligations

. At the time, SiOnyx did not consider the product to be meaningfully different from the devices the parties developed together in 2007.

On Febr u ary 24, 2009, Hamamatsu filed the first of aseries of Japanese patent applications relating to photodetector devices. Hamamatsu subsequently filed patent applications in several countries that claimed priority from these applic ations, including the U.S. applications that became the Disputed U.S. Patents. In 2010, Hamamatsu began releasing the accused products, which include laser

textured photodiodes

, avalanche photodiodes , and charge

coupled device (CCD) sensors. SiOnyx began selling its own photodetector products by 2013, and in 2014 one of SiOnyx’s customers alerted SiOnyx to Hamamatsu’s patents. SiOnyx met with Hamamatsu to discuss ownership of the Disputed U.S. and Foreign P atents, but the parties did not reach an agreeme nt.

II. D ISTRICT C OURT P ROCEEDINGS Having failed to reach an agreement with Hamamatsu regarding ownership of the patents , SiOnyx sued Hamamatsu in the District of Massachusetts . SiOnyx brought four claims: (1) breach of contract; (2) unjust enrichment; (3) infringement of the ’467 patent ; and (4) change of inventorship of the Disputed U.S. Patents. The case was tried to a jury on the issues of infringement, willfulness, invalidity, Case: 19-2359 Document: 58 Page: 5 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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inventorship, breach of contract, unjust enrichment, and dam ages. After a two

- week trial, the jury returned a verdict in favor of SiOnyx. Specifically, the jury found that (1) Hamamatsu first breach ed the NDA on February 1, 2008, when it referred to SiOnyx’s confidential information in an internal report, and award ing $796,469 in damages; (2) Hamamatsu was unjustly enriched beginning January 10, 2010, and awarding $580,640 in damages; (3) SiOnyx’s breach of contract and unjust enrichment claims were not barre d by the statute of limitations; (4) Carey is a

co

- inventor of the Disputed U.S. Patents; and (5) the asserted claims of the ’467 patent are valid and willfully infringed by Hamamatsu beginning December 20, 2011, but awarding $0 in damages.
The parties fil ed numerous post

- trial motions. Hamamatsu moved for judgment as a matter of law that (1) SiOnyx’s breach of contract and unjust enrichment claims were barred by the statute of limitations ; (2) that SiOnyx is not entitled to damages after the NDA’s confide ntiality period ended on January 11, 2015 ; and (3) that Hamamatsu did not willfully infringe the ’467 patent. The district court denied Hamamat s u’s motion. SiOnyx filed post

- trial motion s seeking (1) sole ownership of the Disputed U.S. Patents ; (2) sole ownership of the Disputed Foreign Patents ; ( 3 ) an injunction for breach of the NDA prohibiting Hamamatsu from “making, using, offering for sale, selling,or importing the accused products and/or products practicing the [Disputed U.S. Patents] ” ; ( 4 ) an inju nction for patent infringement prohibiting Hamamatsu from “making, using, offering for sale, selling, or importing the accused products ” practicing the ’467 patent ; ( 5 ) pre

- and post

- judgment interest on damages awarded for breach of contract; ( 6 ) pre

- judg ment interest on damages awarded for unjust enrichment; and ( 7 ) fees under 35 U.S.C. § 285 . The district court granted SiOnyx sole ownership of the Disputed U.S. Patents, injunctions on accused products practicing the Disputed U.S. Patents and the ’ 467 patent
, pre

- and Case: 19-2359 Document: 58 Page: 6 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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post

- judgment interest on damages for breach of contract, and pre

- judgment interest on damages for unjust enrichment. The court denied SiOnyx’s motions for ownership of
t he Disputed Foreign Patents and fees under § 285

. Hamamatsu appealed, and SiOnyx cross

- appealed. We have jurisdiction under 28 U.S.C

. § 1295(a)(1).

D ISCUSSIONIn reviewing issues tried to a jury, we review the district court ’ s denial of post

- trial motions for judgment as a matter of law under the law of the regional circuit. See Finjan, Inc. v. Secure Computing Corp. , 626 F.3d 1197, 1202 (Fed. Cir. 2010) (citing Revolution Eyewear, Inc. v. Aspex Eyewear, Inc. , 563 F.3d 1358, 1370 (Fed. Cir. 2009)). The F irst Circuit reviews denials of post

- verdict motion s for JMOL de novo

, constru ing the facts in the light most favorable to the jury verdict and draw ing any inferences in favor of the non

- movant

. S á nchez v. Foley

, 972 F.3d 1, 10

– 11 (1st Cir. 20 20 ) (citing Blomquist v. Horned Dorset Primavera, Inc. , 925 F.3d 541, 546 (1st Cir. 2019) )

. Judgment as a matter of law should be granted if “a reasonable jury would not have a legally sufficient evidentiary basis to find for the party on tha t issue.” F ED

. R. C IV

. P. 50(a). “ Our review, however, ‘ is weighted toward preservation of the jury verdict, ’ for ‘ we must affirm unless the evidence wasso strongly and overwhelmingly inconsistent with the verdicts that no reasonable jury could have ret urned them. ’ ” Crowley v. L.L. Bean, Inc. , 303 F.3d 387, 393 (1st Cir. 2002) (quoting Rodowicz v. Mass. Mut. Life Ins. Co. , 279 F.3d 36, 41

– 42 (1st Cir. 2002) ). “ ‘ Credibility determinations, theweighing of the evidence, and the drawing of legitimate infe rences from the facts are jury functions, not those of a judge. ’ ” Reeves v. Sanderson Plumbing Prods., Inc.

, 530 U.S. 133, 150

– 51 (2000) (quoting Anderson v. Liberty Lobby

, Inc. , 477 U.S. 242, 255 (1986)). As will be seen, this appeal largely, but not entirely, resolves itself on the fact that most of the determinations were made by a jury. Case: 19-2359 Document: 58 Page: 7 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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I. H AMAMATSU ’ S A PPEAL In this appeal, Hamamatsu challenges the district court’s judgment on the issues of the statute of limitations,

pre

- judgment interest, grant of an injunction for patent infringement, grant of an injunction for breach of contract, damages, ownership of the Disputed U.S. Patents, and willfulness. We address each issue in turn.

A . Statute of Limitatio nsWe first address Hamamatsu’s argument that SiOnyx’s breach of contract and unjust enrichment claims are barred by Massachusetts’s six

- year statute of limitations. The issue was presented to the jury and, although the jury found that Hamamatsu first bre ach ed the NDA on February 1, 2008

— more than six years before SiOnyx filed its complaint

— it nevertheless found that the claims are not barred by the statute of limitations. Hamamatsu moved for JMOL, which the district court denied. See SiOnyx, LLC v. Hama matsu Photonics K.K

. , No. 1: 15

- cv

13488

- FDS ( D. Mass. July 25, 2019), ECF No. 797.
On appeal, Hamamatsu argues that the claims are barred because SiOnyx knew or should have known of Hamamatsu’s breach of the NDA more than six years prior to the filing of i ts complaint

. According to Hamamatsu, at least two events that occurred more than six years prior tothe filing of SiOnyx’s complaint should have alerted SiOnyx to the likelihood of Hamamatsu’s breach , causing the claims to accrue and beginning the limita tions period.First, Hamamatsu argues that SiOnyx knew of Hamamatsu’s breach in February 2008, when Hamamatsu failed to return SiOnyx’s confidential information, as was required by the NDA. Second, Hamamatsu argues that SiOnyx should have known of Hamama tsu’s misuse of SiOnyx’sconfidential information in February 2009, when Hamamatsu emailed SiOnyx a diagram of a photodiode that SiOnyx perceived to be identical to the parties ’ 2007 work. Both events were more than six years prior to the filing of Case: 19-2359 Document: 58 Page: 8 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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SiOnyx’s complaint and, according to Hamamatsu, should bar SiOnyx’s breach of contract and unjust enrichment claims.
SiOnyx responds that Hamamatsu presented both defenses at trial, and the jury n onetheless determined thatSiOnyx’s claims were not barred by the statute of limitations. According to SiOnyx, a reasonable jury could have determined that Hamamatsu’s failure to return SiOnyx’s confidential information was an immaterial breach that did n ot begin the limitations period

, or that Hamamatsu concealed its later use of SiOnyx’s confidential information through its repeated assurances that its new products did not infringe SiOnyx’s intellectual property

. We agree with SiOnyx. In Massachusetts, “ any disputed issues relative to the statute of limitations ought to be decided by the jury. ” Riley v. Presnell

, 565 N.E.2d 780

, 787 ( Mass. 1991). “ In most instances, the question when a plaintiff knew or should have known of its cause of action is one o f fact that will be decided by the trier of fact. ” Taygeta Corp. v. Varian Assocs., Inc.

, 736 N.E.2d 1053

, 1063 ( Mass. 2002) (citing Riley

, 565 N.E.2d at 787 ). Here, the jury was presented with the terms of the NDA

, the circumstances surrounding its expi ration , and Hamamatsu’s failure to retu r n SiOnyx’s confidential information , and it found that the limitations period did not begin to run at that time

. We agree with the district court that a reasonable juror could have determined that SiOnyx was not harmed by Hamamatsu’s failure to return the confidential information and that the breach was therefore immaterial and did not cause SiOnyx’s claims to accrue.
Regarding the 2009 emails, the jury similarly was presented with competing evidence, and concluded that the limitations period did not begin to run at that time. WhileHamamatsu elicited testimony that SiOnyx was “concerned” about the similarities between Hamamatsu’s products and the parti es ’ 2007 work, J.A. 624, the jury was also Case: 19-2359 Document: 58 Page: 9 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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presented with multiple statements by Hamamatsu to SiOnyx that Hamamatsu’s products did not make use of SiOnyx’s confidential information. J.A. 3011, 3021

.Weighing competing evidence is the quintessential funct ion of the jury and, c onfronted with this evidence, a reasonable jury could have determined that SiOnyx did not know, nor should it have known, of Hamamatsu’s breach at that time . As the district court noted, “[w]hether a plaintiff knew or should have kno wn of an injury so as to triggerthe running of a statute of limitations is, with rare exception, a jury issue,” SiOnyx, LLC v. Hamamatsu Photonics K.K. , No. 1: 15

- cv

- 13488

- FDS (D. Mass. July 25, 2019), ECF No. 797, slip op. at 2 (quoting Santiago Hodge v. Parke Davis & Co. , 909 F.2d 628, 633 (1st Cir. 1990) )

, and we perceive no reason to upset the jury’s verdict here

. B . Pre

- Judgment Interest

Hamamatsu contends that the district court erred in awarding pre

- judgment interest for SiOnyx’s breach of contract and unjust enrichment claims. Hamamatsu makes two principal arguments. First, it argues that no pre

- judgment interest should be available for unjust enrichment based on disgorged profits . Second, Hamamatsu argues that the court erred in awarding interest for the breach of contract damages from the date of first breach because SiOnyx suffered no financial harm until a later time. We consider Hamamatsu’s arguments in turn.
1. Unjust enrichment

T he parties’ dispute turns on whether the Massachusetts statutory provision for pre

- judgment interest for contract claims applies to disgorged profits for unjust enrichment. M ASS

. G EN

. L AWS ch. 231

, § 6C provides that “[i] n all actions based on contractual obligations

. . . interest shall be adde d

. . . to the amount of damages .

. . from the date of the breach

. . . .” Hamamatsu argues that, because profit disgorgement is not designed to make the plaintiff whole, but rather to punish the defendant, it is not Case: 19-2359 Document: 58 Page: 10 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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“damages” within the meaning of the s tatute. For support, Hamamatsu relies on Governo Law Firm, LLC v. CMBG3 Law, LLC , in which the Massachusetts Superior Court held that an “ award to disgorge profits earned by the misuse of trade secrets or confidential information is not ‘ damages ’ within the meaning of the statutes that govern pre

judgment interest, and thus is not the sort of recovery as to which pre

- judgment interest accrues as of right

. ” 2019 WL 3801560 , at *7 (Mass. Sup. Ct. July 29, 2019). SiOnyx responds that § 6C applies t o contract

- based claims for unjust enrichment and therefore it is entitled to pre

- judgment interest from the date of first breach. For its part, SiOnyx relies on Bushkin Associates, Inc. v. Raytheon Co. , in which the First Circuit held that “ quantum merui t is encompassed by the pre

- judgment interest statute .” 906 F.2d 11, 1 5 (1st Cir. 1990).
We agree with SiOnyx and the district court that damages for unjust enrichment are subject to § 6C. Under Massachusetts law, unjust enrichment is the “ underlying bas is for awarding quantum meruit damages in a quasi

- contract

case .” Salamon v. Terra

, 477 N.E.2d 1029, 1031 ( Mass. 1985)

. Thus, the First Circuit’s holding in Bushkin that § 6C applies to quantum meruit appears to apply equally
to SiOnyx’s contract

- based unjust enrichment claim

. To the extent that Governo appears to suggest otherwise, we note that in that case the court considered damages in the context of § 6B (the statute governing pre

- judgment interest for tort claims), not § 6C. Accordingly, we agre e that § 6C applies to the jury’s award of damages for unjust enrichment and that the district court correctly awarded pr e

judgment interest from the date of first breach

. 2. Breach of Contract

W e now turn to Hamamatsu’s second argument that awarding pre

- judgment interest for SiOnyx’s breach of contract claim from the date of first breach determined by the jury is improper because SiOnyx did not suffer financial Case: 19-2359 Document: 58 Page: 11 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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harm at that time. Relying on Bank v. Thermo Elemental Inc.

, 888 N.E.2d 897 ( Mass

. 2008)

, and S teri lite Corp. v. Continental Cas ualty Co.

, 494 N.E.2d 1008 ( Mass. 1986), Hamamatsu contends that, even under § 6C, pre

- judgment interest should be awarded only from the time the plaintiff was deprived of funds, so as not to produc e an undeserved windfall. Accordingly, Hamamatsu urges us to vacate the district court’s pre

- judgment interest award and remand for a determination of the date when SiOnyx first suffered financial h arm. We disagree with Hamamatsu

. As an initial matter, Hamamatsu overreads the meaning of Thermo Elemental and S teri lite

. In each of those cases, the plaintiff sought, and received, damages for payments that it was forced to make as a result of the defen dant’ s earlier breach of contract. That is, the damages were essentially reimbursement for expenditures of fixed amounts on known datesthat the plaintiff would not have made but for the defendant ’ s breach . In those circumstances, even though the breach had occurred at an earlier date, disallowance of pr e

judgment interest prior to the time that the plaintiff was improperly forced to lay out its own money for which it sought reimbursement is a reasonable interpretation of § 6C because the plaintiff had not lost access to those funds prior to those expenditures.

But the circumstances here do not lend themselves to such a tidy accounting. At trial, the jury was present edwith multiple damages theories, including a $1 million upfront license fee, J.A. 1700, a 7% royalty on sales of the accused products, J.A. 1532, and over $2 million from a lost partnership with Nikon in 2015. J.A. 1557. The jury’s ultimate award of $7 94,469 matches none of th o se theories

, and the verdict forms shed no light on the jury’s perceived timing of the damages

, other than the date on which the jury determined that Hamamatsu first breached the NDA

. In light of the jury’s verdict, we discern no rational basis for assigning the jury’s damages award to specific dates Case: 19-2359 Document: 58 Page: 12 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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between 2008 and 2015 for the purpose of calculating pre

judgment interest , and therefore we see no reason to deviate from the general rule for pre

- judgment interest on contract claim s set out in § 6C.

C . Injunction for Infringement of the ’467 Patent
Hamamatsu argues that the district court erred in granting SiOnyx’s motion for a permanent injunction prohibiting Hamamatsu from “making, using, offering for sale, selling, or importing” the products held to infringe the ’467 patent. A party seeking a permanent injunction for patent infringement must demonstrate: “ (1) that it has suffered an irreparable injury; (2) that remedies available at law, such as monetary damages, are inadequate t o compensate for that injury; (3) that, considering the balance of hardships between the plaintiff and defendant, a remedy in equity is warranted; and (4) that the public interest would not be disserved by a permanent injunction. ” eBay Inc. v. MercExchange, L.L.C.

, 547 U.S. 388, 390

– 91 (2006). Hamamatsu argues primarily that SiOnyx failed to demonstrate irreparable harm and an inadequate remedy at law. Specifically, Hamamatsu argues that SiOnyx cannot show irreparable harm because SiOnyx’s products do not compete with the accused products. And because the parties do not directly compete, according to Hamamatsu, money damages could provide adequate compensation for Hamamatsu’s continued sales of the accused products. Hamamatsu has not argued the balance of harms and public interest factors , so we need not address them

. SiOnyx responds that its products do in fact compete with the accused products . SiOnyx argues that it will suffer irreparable harm from Hamamatsu’s continued sales of the accused products because SiOnyx would be the only supplier of products practicing the technology disclosed in the ’467 patent but for Hamamatsu’s misuse of SiOnyx’s confidential information. Absent Hamamatsu’s Case: 19-2359 Document: 58 Page: 13 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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reliance on SiOnyx’s confidential info rmation, SiOnyx argues, Hamamatsu never could have entered the market, or at a minimum its entry would have been delayed, and therefore the court did not abuse its discretion in determining that damages at law would be impossible to quantify and inadequate

. We agree with SiOnyx. We review the decision to grant a permanent injunction for an abuse of discretion. Robert Bosch LLC v. Pylon Mfg. Corp. , 659 F.3d 1142, 114 7 (Fed. Cir. 2011). “We may find an abuse of discretion on a showing that the court made a clear error of judgment in weighing relevant factors or exercised its discretion based upon an error of law or clearly erroneous factual findings.” Innogenetics, N.V. v. Abbott Lab ’y s. , 512 F.3d 1363, 1379 (Fed. Cir. 2008) (internal quotation marks omitt ed). Based on the record before us , Hamamatsu has not demonstrated that the district court so erred. In granting the injunction, the district court found that SiOnyx’s laser

- processed CMOS sensors are competitive products with Hamamatsu’s accused CCD sen sors

. SiOnyx, LLC v. Hamamatsu Photonics K.K

. , No. 1: 15

- cv

- 13488

- FDS , 2019 WL 3358599, at *3 (D. Mass. July 25, 2019). The court relied on the trial
test i mony of SiOnyx’s expert, Dr. Ezekiel Kruglick

, thatCMOS sensors or CCD sensors could be used for some applications. J.A. 1438. Hamamatsu counters with the testimony of Si O nyx’s CEO, Steve Saylor, that Hamamatsu’s products “would not really get in the way of SiOnyx ’ s core business dramatically.” J.A. 876

. But the existence of contrary testimony alone does not make the district court’s finding clearly erroneous

. See Anderson v. City of Bessemer City , 470 U.S. 564, 574 (1985) (“Where there are two permissible views of the evidence, the fact

- finder’s choic e between them cannot be clearly erroneous.” (citing United States v. Yellow Cab Co. , 338 U.S. 338, 342 (1949)) )

. B ased on the record before us

, we are not convinced that the district court clearly erred in finding that the accused products are competitiv e with SiOnyx’s products , and Case: 19-2359 Document: 58 Page: 14 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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Hamamatsu has not otherwise persuasively refuted the demonstrat ion of irreparable harm.
Further, we conclude that the district court did not abuse its discretion in finding that money damages would be inadequate to compensate SiOnyx. The jury found that Hamamatsu breached its NDA with SiOnyx by using SiOnyx’s confidential information and that the accused products infringe the ’467 patent . Hamamatsu does not appeal those findings , and it is therefore eviden t that Hamamatsu’s development of the accused products and entry into the relevant markets were aided and accelerated by its improper use of SiOnyx’s confidential information

. Because SiOnyx would have otherwise had those markets to itself, at least for some per iod of time , we agree with SiOnyx that it was not an abuse of discretion for the court to determine that it was difficult to quantify the harm to SiOnyx due to Hamamatsu’s premature entry in those markets

. Accordingly, we affirm the district court’s grant of a permanent injunction for infringement of the ’467 patent.

D . Injunction for Breach of Contract
The district court also granted a permanent injunction as a remedy for SiOnyx’s breach of contract claim

, prohibiting Hamamatsu from “making, using, offeri ng for sale, selling, or importing the accused products and/or products practicing ” the Disputed U.S. Patents

. SiOnyx, LLC v. Hamamatsu Photonics K.K

. , No. 1: 15

- cv

- 13488

- FDS , 2019 WL 3358599, at *2 (D. Mass. July 25, 2019)

. We review non

patent issues un der the law of the regional circuit. VersaTop Support Sys., LLC v. Georgia Expo, Inc. , 921 F.3d 1364, 1368 (Fed. Cir. 2019). In Massachusetts, injunctive relief is appropriate where (1) the plaintiff would suffer irreparable harm absent injunctive relief , (2) there is inadequate remedy at law, and (3) the harm to plaintiffs wouldoutweigh the harm the defendant would suffer from the imposition of an injunction

. See John T. Callahan & Sons, Case: 19-2359 Document: 58 Page: 15 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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Inc. v. City of Malden

, 713 N.E.2d 955

, 960 ( Mass. 1999) (citing Packaging Indus. Grp., Inc. v. Cheney

, 405 N.E.2d 106
, 111

– 12 ( Mass. 1980)). T rial judges have broad discretion to grant or deny injunctive relief, which is reviewed for abuse of discretion. Lightlab Imaging, Inc. v. Axsun Techs., Inc.

, 13 N.E.3 d 604

, 614 ( Mass. 2014) (citing Johnson v. Martignetti

, 375 N.E.2d 290

, 298 ( Mass. 1978)

, and Curtiss

– Wright Corp. v. Edel

–

Brown Tool & Die Co.

, 407 N.E.2d 319

, 326 ( Mass. 1980) ).
Due to the similarity of the legal standard, t he parties’ arguments are subs tantially similar to those made with respect to the injunction for patent infringement, and we reach the same conclusion. Hamamatsu additionally argues that the injunction does not prevent future harm to SiOnyx because the NDA’s confidentiality period has expired

, and the confidential information has been made public. Thus, according to Hamamatsu, the injunction operates only to punish Hamamatsu for its past conduct. But Hamamatsu ignores the ongoing benefit it receives from having improperly used SiOnyx ’s confidential information to develop its products. As we explained with respect to the injunction for infringement of the ’467 patent
, it was not an abuse of discretion for the district court to determine that the harm to SiOnyx from Hamamatsu’s head start in developing its products and premature entrance to the market was irreparable and not adequately remedied by money damages, and for the same reason, we affirm here

. E . Damages After the Confidentiality Period

Hamamatsu filed a post

- trial motion for judgment as a matter of law that SiOnyx is not owed damages for the breach of contract and unjust enrichment claims after the confidentiality period of the NDA expired on January 11, 2015. The district court denied the motion. See SiOnyx, LLC v. Hamamatsu Photonics K.K

. , No. 1: 15

- cv

- 13488

- FDS ( D. Mass. July 25, 2019), ECF No. 797. Hamamatsu argues Case: 19-2359 Document: 58 Page: 16 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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that the court erred in denying its motion because Hamamatsu’s use of that information was no longer in breach after the confidentialit y period ended , and SiOnyx thereforeis entitled only to Hamamatsu’s profits through 2014. SiOnyx responds that the jury reasonably could have inferredthat Hamamatsu continued to benefit from its breach beyond the expiration of the confidentiality period

. We agree with SiOnyx. As we have noted above, andas the district court observed below, “[a]lthough [Hamamatsu] may not have ‘disclosed’ confidential information after the nondisclosure agreement ended in January 2015, the jury’s verdict can be reasonab ly construed to incorporate a finding that [Hamamatsu] continued to reap the benefit of their earlier breach by selling products that it had designed using [SiOnyx’s] confidential information.” Id . slip op. at 3

. We agree that such an inference is reason able, and we decline to alter the jury’s damages award

. F . Ownership of the Disputed U.S Patents
In its complaint, SiOnyx requested correction of inventorship of the Disputed U.S. Patents under 35 U.S.C. § 256 to name Carey as inventor. The jury was charged with determining whether Carey was an inventor and, if so, whether he was the sole inventor or a co

- inventor. The jury returned a verdict in favor of SiOnyx and found that Carey should be added as a co

- inventor of the Disputed U.S. Patents. In post

- trial motion s , SiOnyx asked the district court to grant sole ownership of all disputed patents to SiOnyx as a remedy for Hamamatsu’s breach of contract. J.A. 2239. SiOnyx’s request was based on Paragraph 5 of the NDA, which provides that “[t]he Receiving Party acknowledges that the Disclosing Party .

. . claims ownership of the Confidential Information disclosed by the Disclosing Party and all patent, copyright, trademark, trade secret, and other intellectual property rights in, or arising from, such Confidential Information.” J.A. 2882. Case: 19-2359 Document: 58 Page: 17 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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The court granted SiOnyx’s motion with respect to the Disputed U.S. Patents and denied the motion with respect to the Disputed Foreign Patents. See SiOnyx, LLC v. Hamamatsu Photonics K.K

. , No. 1: 15

- cv

- 134 88

- FDS , 2019 WL 3358599 (D. Mass. July 25, 2019); SiOnyx, LLC v. Hamamatsu Photonics K.K

. , No. 1: 15

- cv

- 13488

- FDS ( D. Mass. Sep t . 24, 2019), ECF No. 831. The court reasoned that the jury’s verdict that Hamamatsu breached the NDA by using SiOnyx’s confident ial information and that Carey should be named a co

- inventor of the Disputed U.S. Patents necessarily implies that those patents arose, at least in part, from SiOnyx’s confidential information. SiOnyx

, 2019 WL 3358599, at *1. Thus, the court concluded th at SiOnyxshould be granted ownership of the patents under Paragraph 5 of the NDA. Id . at *2. With respect to the Disputed Foreign Patents, the court did not question whether the same rationale applied , but nonetheless declined to grant ownership to SiOnyx because the court questioned its authority to do so. We address the district court’s decisionwith respect to the Disputed U.S. Patents here and the Disputed Foreign Patents in SiOnyx’s cross

- appeal, below.
On appeal, Hamamatsu argues that the district court erred in granting SiOnyx sole ownership of the Disputed U.S. Patents because the jury’s finding of co

- inventorship necessarily implies that the jury found that Hamamatsu also contributed to the pa tents. According to Hamamatsu,it is therefore equally entitled to ownership under Paragraph 5 of the NDA because the patents also “arose from” its information. SiOnyx responds that the court did not abuse its discretion because the jury’s verdict establ ishes that the patents are based on its confidential information, requiring transfer of ownership under Paragraph 5 of the NDA.
The district court’s decision transferring ownership ofthe patents according to the terms of the NDA is an equitable remedy whi ch is reviewed for abuse of discretion under Massachusetts law. Cavadi v. DeYeso

, 941 N.E.2d 23

, Case: 19-2359 Document: 58 Page: 18 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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31 ( Mass. 2011) (quoting Demoulas v. Demoulas

, 703 N.E.2d 1149

, 1174 ( Mass. 1998) )

. We agree with SiOnyx that the district court did not abuse its discretion in granting SiOnyx sole ownership of the Disputed U.S. Patents.

“ It is elementary that inventorship and ownership are separate issues ,” Beech Aircraft Corp. v. EDO Corp. , 990 F.2d 1237, 1248 (Fed. Cir. 1993)

, and while conception is the touchstone of inv entorship, ownership operates based on contract or law

— in this case, the NDA

. Corporations are not inve n tors, but they derive ownership rights through contracts, usually with employees, or provisions of law. Thus, while Hamamatsu employees may be co

- inve ntors,and their rights transferred to their employer, Hamamatsu, Hamamatsu is the contracting party in the NDA

, and
t he NDA provides that ownership of patents arising from confidential information exchanged under the agreement is claimed by the disclosing party. But Hamamatsu hasnot established that any of the patents arose from confidential information disclosed under the agreement and therefore has failed to show that it is entitled to joint ownership

. The primary shortcoming in Hamamatsu’s argument is its conflation of the contribution of any information to the patents with the contribution of confidential information within the meaning of the NDA . T o the extent that the jury’s finding implies that Hamamatsu contributed its own information to the patents, it does not necessarily follow that Hamamatsu contributed confidential information to the patents within the meaning of the NDA, other than that which it appropriated from SiOnyx. In its briefing, Hamamatsu does not direct us t o any evidence presented to the jury or to the district court even suggesting that the patents arose in part from its confidential information such that Paragraph 5 also operates to assign co

- ownership to Hamamatsu , and we cannot otherwise identify any

. Absent evidence that Hamamatsu contributed confidential information to the patents under the NDA, it is not entitled
to co

- ownership of the patents under the agreement. Case: 19-2359 Document: 58 Page: 19 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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A side from the absence of evidence that Hamamatsu contributed confidential information to the patents, the implication that Hamamatsu made other contributions to the patents does not warrant a different result. T o the extent that the jury’s finding that Carey is a co

- inventor rather than the sole inventor implies that Hamamatsu personnel contributed to the claimed inventions, the modification of claims founded upon SiOnyx’s confidential information

“ does not negate the imposition of an equitable reme dy ,” Richardson v. Suzuki Motor Co., Ltd. , 868 F.2d 1226, 1249 (Fed. Cir. 1989), and does not demonstrate that the district court abused its discretion to provide equitable relief

. Accordingly, we affirm the district court’s decision granting sole ownersh ip of the Disputed U.S. Patents to SiOnyx.

G . Willfulness
Finally, Hamamatsu appeals the willfulness judgment.The jury returned a verdict finding that Hamamatsu’s infringement of the ’467 patent was willful. D espite its finding of willful infringement, the jury awarded SiOnyx $0 in damages for Hamamatsu’s infringement. SiOnyx filed a post

- trial motion for enhanced damages under 35 U.S.C. § 284, requesting that the district court assess $490,889 in damages for patent infringement and treble those damage s based on the jury’s finding of willfulness. SiOnyx, LLC v. Hamamatsu Photonics K.K. , No. 1: 15

- cv

- 13488

- FDS , 2019 WL 3358691, at *1 (D. Mass. July 25, 2019)

. The court declined to assess damages for patent infringement, concluding that “i t is certainly r easonable to interpret the jury’s verdict as a rational attempt to award damages for both breach of contract and patent infringement while avoiding an award of duplicative damages .” Id

. at *2. Because the court could not ascertain the amount of damages t he jury intended to award for patent infringement, the court held that “it is impossible to treble that amount” and denied SiOnyx’s motion for enhanced damages. Id

. Nonetheless,Hamamatsu moved for judgment as a matter of law on willfulness, which the district court denied. Case: 19-2359 Document: 58 Page: 20 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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On appeal, Hamamatsu maintains that its infringement was not willful, challenging the adequacy of the evidence presented at trial to support the jury’s finding.However, given that the district court awarded no enhanced damages based on willfulness

, it is not apparentwhat effect the jury’s finding of willfulness had on the district court’s judgment, and it is likewise not apparent what the effec t a reversal by this court would be . We cannot reduce the enhanced damages awarded to SiOnyx for Hamamatsu’s allegedly willful infringement because no suchdamages exist. Because there is no “tangible, demonstrable consequence” to the jury’s finding of w illfulness, ourconsideration of the issue would be tantamount to an advisory opinion, which we lack the authority to provide. Samsung Elec. Co., Ltd. v. Rambus, Inc. , 523 F.3d 1374, 1380 (Fed. Cir. 2008) (quoting Chathas v. Local 134 IBEW , 233 F.3d 508, 512 (7th Cir. 2000) )

. Accordingly, we decline to address the willfulness issue

. II. S I O NYX ’ S C ROSS

- A PPEAL SiOnyx raises two issues in its cross

- appeal. First, it argues that the district court erred in denying its request to grant SiOnyx sole ownership o f the Disputed Foreign Patents. Second, it argues that the district court erred in denying its motion for attorney fees under 35 U.S.C. § 285. A. Ownership of the Disputed Foreign Patents
Although the district court granted sole ownership of the Disputed U.S. Patents to SiOnyx, it declined to grant to SiOnyx ownership of the Disputed Foreign Patents

— that is, Hamamatsu’s Japanese patents and any non

- U.S. patents claiming priority therefrom. SiOnyx, LLC v. Hamamatsu Photonics K.K

. , No. 1: 15

- cv

- 13488

- FDS ( D. Mass. Sep t . 24, 2019), ECF No. 831. The court appears to havedeclined to do so for two principal reasons: first, uncertainty regarding the court’s jurisdiction to grant ownershipof foreign patents; and second, failure by SiOnyx adequately to identify the foreign patents for which it was Case: 19-2359 Document: 58 Page: 21 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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requesting ownership. SiOnyx contends that the district court erred because the same evidence that establishes its right to sole ownership of the Disputed U.S. Patents establishes its right to sole ownershi p of the Disputed Foreign Patents , and the court had authority to compel the transfer of ownership of the foreign patents because the court had jurisdiction over Hamamatsu. Hamamatsu’s argument to the contrary is substantially similar to its argument with respect to the Disputed U.S. Patents

— that is, Hamamatsu also contributed to the Japanese applications and foreign counterparts, and therefore SiOnyx is entitled at most to joint ownership.
We agree with SiOnyx that the evidence that established SiOnyx’s r ight to sole ownership of the Disputed U.S. Patents also applies to the Disputed Foreign Patents

. And because the district court erroneously perceived that it lacked authority to compel the transfer of ownership, we conclude that it was an abuse of discre tion to distinguish between the two groups of patents

. As we discussed above with respect to the Disputed U.S. Patents, we agree that the jury’s findings compel the conclusion that those patents arose from SiOnyx’s confidential information and that Hamama tsu has not shown th at it contributed confidential information entitling it to joint ownership . And because the Disputed U.S. Patents claim priority from Hamamatsu’s Japanese patent applications, the Japanese applications must be for the same inventions a s the Disputed U.S. Patents

. See 35 U.S.C. § 119(a). Thus, Hamamatsu’s Japanese patent applications and any applications claiming priority from the Japanese applications in other countries must also have arise n from SiOnyx’s confidential information. Ac cordingly, we conclude that SiOnyx is entitledto sole ownership of the Japanese applications and any foreign applications claiming priority therefrom.
Turning to the district court’s jurisdiction to grant ownership of foreign patents, it is well established that courts have authority to compel parties properly before them to Case: 19-2359 Document: 58 Page: 22 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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transfer ownership of foreign patents, just as they would any other equitable re medy. See Richardson , 868 F.2d at 1249. This is because an order compelling a party to assign ownership of a foreign patent is an exercise of the court’s authority over the party, not the foreign patent office in which the assignment is made . Here, ther e is no argument that the district court lacked jurisdiction over Hamamatsu,and therefore the court had authority to compel assignment of foreign patents. And our judgment does not in any way deal with validity of foreign patents, which is a matter for f oreign courts and patent offices. Because we perceive no rational basis for disparate treatment of the DisputedU.S. Patents and the Disputed Foreign Patents, we conclude that the district court abused its discretion in declining to grant to SiOnyx sole o wnership of Hamamatsu’sJapanese applications and any foreign applications claiming priority therefrom.

B. Section 285 Fees
Finally, SiOnyx argues that the district court abused its discretion in denying SiOnyx’s motion to declare this case exceptional und er 35 U.S.C. § 285. See SiOnyx, LLC v. Hamamatsu Photonics K.K

. , No. 1: 15

- cv

- 13488

- FDS ( D. Mass. July 25, 2019), ECF No. 798

. Under § 285, a “court in exceptional cases may award reasonable attorney fees to the prevailing party.” An exceptional case und er § 285 is “one that stands out from others with respect to the substantive strength of a party’s litigating position (considering both the governing law and the facts of the case) or the unreasonable manner in which the case was litigated.” Octane Fitne ss, LLC v. ICON Health & Fitness, Inc. , 572 U.S. 545, 554 (2014). SiOnyx argues that this case is exceptional in both respects. First, it argues that thestrength of Hamamatsu’s litigating position was exceptionally weak due to its overt copying of SiOnyx’s patentedtechnology, as evidenced by the jury’s finding of willful infringement. Second, SiOnyx argues that Hamamatsu’s litigation conduct was unreasonable because it sought to Case: 19-2359 Document: 58 Page: 23 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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increase the cost and duration of litigation to strain SiOnyx’s resou rces. SiOnyx urges that the district court applied the wrong legal standard by requiring evidence that Hamamatsu “ deliberately attempted ” to increase the cost and complexity of the case for an improper purpose.
Hamamatsu responds that the district court d id notabuse its discretion in denying SiOnyx’s motion. Hamamatsu argues that the jury’s finding of willful infringement is not determinative of whether a case is exceptional under § 285, and that its litigation conduct was consistent with an aggressive d efense but was not otherwise uncommon or exceptional.
We agree with Hamamatsu. We review the grant or denial of attorney fees under § 285 for an abuse of discretion. Highmark Inc. v. Allcare Health Mgmt. Sys., Inc. , 572 U.S. 559, 5 63

– 64 (2014); Bayer Cro pScience AG v. Dow AgroSciences LLC , 851 F.3d 1302, 1306 (Fed. Cir. 2017) (citing Mentor Graphics Corp. v. Quickturn Design Sys., Inc. , 150 F.3d 1374, 1377 (Fed. Cir. 1998)). To satisfy that standard, an appellant must demonstrate that the district
court made “a clear error of judgment in weighing relevant factors or in basing its decision on an error of law or on clearly erroneous factual findings.” Bayer , 851 F.3d at 1306 (quoting Mentor Graphics , 150 F.3d at 1377). While willfulness is “among the reas ons that a court may find a case to be exceptional

, ” Therasense, Inc. v. Becton, Dickinson & Co. , 745 F.3d 513, 516 (Fed. Cir. 2014), “ an attorney fee award is not mandatory when willful infringement has been found

, ” Whit S erve, LLC v. Computer Packages, In c. , 694 F.3d 10, 37 (Fed. Cir. 2012) (citing Spectralytics, Inc. v. Cordis Corp. , 649 F.3d 1336, 1349 (Fed. Cir. 2011)). Here, despite the jury’s finding of willful infringement, the district court concluded that Hamamatsu’s noninfringement and invalidity defenses were not so weak as to be exceptional, in particular noting that SiOnyx failed even to move for summary judgment on those issues. While the district court may have been permitted to award fees under § 285 Case: 19-2359 Document: 58 Page: 24 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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based on the jury’s finding of willfulness, it was not required to do so, and SiOnyx has not otherwise demonstrated that Hamamatsu’s infringement defenses were so weak as to be exceptional.
With regard to Hamamatsu’s litigation conduct, we reject SiOnyx’s argument that the district court applied thewrong legal standard. While the court observed that SiOnyx “provided no evidence that counsel deliberately attempted to increase the cost and complexity of this case for any improper purpose,” it is apparent th at the courttreated this as a factor in its inquiry, not as a legal standard. SiOnyx otherwise relies on several aspects of the litigation as evidence that Hamamatsu intentionally extend ed the litigation to increase SiOnyx’s costs , including Hamamatsu’s refusal to settle, refusal to waive service of process,providing incomplete information during discovery, and excessive post

- trial motions. But while Hamamatsu’s conduct may have had the effect of extending the litigation and commensurately increasing co st , we cannot say that the district court abused its discretion in not finding that delay alone was Hamamatsu’s purpose. Hamamatsu was not obligated to settle or to waive service. And having dealt directly with the parties’ discovery disputes and post

- tr ial motions, the district court was well

- situated to determine whether Hamamatsu’s conduct was unreasonable . Ultimately, abuse of discretion is a deferential standard, and while the district court may have been within its right to grant SiOnyx’s motion fo r fees under these circumstances, we cannot say that it abused its discretion in denying fees.

C ONCLUSION We have considered the parties’ remaining arguments but find them unpersuasive. For the foregoing reasons, we

reverse the district court’s decision d enying SiOnyx sole ownership of the Disputed Foreign Patents. We decline to Case: 19-2359 Document: 58 Page: 25 Filed: 12/07/2020SIONYX LLC v. HAMAMATSU PHOTONICS K

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address the issue of willfulness and affirm the district court’s judgment in all other respects.

AFFIRMED

- IN

- PART, REVER S ED

- IN

- PART

C OSTS Costs to SiOnyx. Case: 19-2359 Document: 58 Page: 26 Filed: 12/07/2020