Wednesday, September 23, 2015

Follow-Ups to Recent Posts on Noninfringing Alternatives in Canada, Punitive Damages in India

1.  As a follow-up to two previous posts on Apotex v. Merck and the noninfringing alternative defense in Canada (see here and here), Norman Siebrasse published an interesting post last week on Sufficient Description questioning why Canada's Federal Court of Appeal seems to premise the availability of the defense on the defendant's not having infringed intentionally.  I agree with Professor Siebrasse that intent shouldn't be relevant to this issue, though (like Professor Siebrasse) I am happy that the court accepted, in principle, the relevance of noninfringing alternatives to the calculation of patent damages.  Now if only someone could convince the courts in the U.K. to follow suit.  For one of my periodic gripes on U.K. practice in this regard, see here.  For my previous post on the Apotex case, see here.

2.  On SpicyIP, Kiran George has published an interesting post on punitive damages for trademark infringement in India, which makes for a nice sequel to Prashant Reddy's post on which I blogged here.

Tuesday, September 22, 2015

Federal Circuit Affirms $15 Million Damages Award Against Samsung

In an opinion handed down yesterday, Summit 6, LLC v. Samsung Electronics Co. (available here) the Federal Circuit affirmed a $15 million judgment against Samsung in a case involving a patent on a "web-based media submission tool" that allegedly is infringed by users of Samsung smartphones.  The opinion is by Judge Reyna.  

After affirming the district court's claim construction and the jury's determinations on infringement and validity, the court focuses on the admissibility of the plaintiff's expert's testimony:
To estimate a reasonable royalty rate in this case, Mr. Benoit started by estimating that the carriers pay Samsung $14.15 to include a camera component in Samsung’s phones. J.A. 6372. To arrive at this estimate, Mr. Benoit used Samsung’s annual reports, internal cost and revenue spreadsheets, and interrogatory responses to determine that the camera component accounted for 6.2% of the phone’s overall production cost. J.A. 6374. Accordingly, he attributed 6.2% of Samsung’s revenue from selling each phone—i.e., $14.15—to the camera’s functionality. J.A. 6374.
To apportion the camera-related revenue further, Mr. Benoit estimated the percentage of camera users who used the camera to perform the infringing methods rather than for other purposes. To do this, he relied on surveys commissioned by Samsung in the ordinary course of its business and on another survey he found on his own. J.A. 6374-75. The surveys were conducted by J.D. Power and Associates, Pugh Research, Forrester, and ComScore. J.A. 6375. Using the surveys, Mr. Benoit estimated that at least 65.3% of camera users used the camera regularly to capture only photos rather than video. J.A. 6377-79. He calculated that at least 77.3% of those users who captured only photos shared the photos, and that at least 41.2% of those users who shared the photos did so by MMS rather than by email or web storage. J.A. 6379-84. Lastly, Mr. Benoit observed that 100% of those photos shared by MMS were resized. J.A. 6384. Multiplying these percentages together, Mr. Benoit thus estimated that at least 20.8% of camera users utilized the camera for the infringing features rather than for other camera related features.
Based on these usage statistics, Mr. Benoit concluded that 20.8% of Samsung’s $14.15 revenue for including the camera component in each phone—i.e., $2.93—was due to the infringing features. J.A. 6386. Using Samsung’s annual reports to estimate its profit margins and capital asset contributions, Mr. Benoit concluded that $0.56 of the $2.93 revenue was profit attributable to the infringement. J.A. 6386-89.
Mr. Benoit testified that to determine a reasonable royalty at a hypothetical negotiation, the parties would focus on allocating the $0.56 benefit Samsung gained by utilizing the patented features. Mr. Benoit testified that the negotiation would concern the entire $0.56 benefit because Samsung had no non-infringing alternatives, and the entire benefit was therefore incremental profit from using the patent. J.A. 6390. Mr. Benoit testified that because neither party had a stronger negotiating position, the parties would have split the $0.56 evenly to derive a reasonable royalty of $0.28 per device. J.A. 6389-91, 6395. Mr. Benoit cited three academic articles and the Nash Bargaining Solution to support his theory of an even split./3 Based on the per-device royalty and on the number of infringing devices sold by Samsung, Mr. Benoit estimated that a hypothetical negotiation would have resulted in a reasonable royalty of $29 million. J.A. 6398. . . .
In this case, Mr. Benoit’s damages methodology was based on reliable principles and was sufficiently tied to the facts of the case. Mr. Benoit first estimated Samsung’s economic benefit from infringement by specifically focusing on the infringing features and by valuing those infringing features based on Samsung’s own data regarding use and on its own financial reports outlining production costs and profits. Mr. Benoit then envisioned a hypothetical negotiation in which the parties would have bargained for respective shares of the economic benefit, given their respective bargaining positions and alternatives to a negotiated agreement. Mr. Benoit’s methodology was structurally sound and tied to the facts of the case. 
That Mr. Benoit’s methodology was not peer-reviewed or published does not necessitate its exclusion. . . .
Samsung argues that Mr. Benoit’s “premise . . . that a feature’s use is proportional to its value” was incorrect and contradicted by expert testimony. Defendant-Appellant’s Opening Br. at 6. But as we noted in Lucent, “an invention used more frequently is generally more valuable than a comparable invention used infrequently” and “frequency of expected use and predicted value are related.” 580 F.3d at 1333. There is no dispute that use of the claimed invention is relevant under Georgia-Pacific: Georgia-Pacific factor 11 looks at use of the invention and at evidence probative of the value of that use. . . .
To the extent Mr. Benoit’s credibility, data, or factual assumptions have flaws, these flaws go to the weight of the evidence, not to its admissibility. . . .

/3  On appeal, Samsung does not challenge Mr. Benoit’s use of Nash Bargaining.
Maybe I'm misunderstanding something here, but the court's characterization of $0.56 as the "benefit Samsung gained by utilizing the patented features" strikes me as a bit odd, because (at least the way the court discusses this matter) it sounds as if the expert simply said "Here's the profit attributable to this feature," without any consideration of possible noninfringing alternatives.  From an economic perspective, the benefit must be judged in light of those alternatives, and only the incremental benefit is properly considered value derived from the use of the patented technology.  But maybe the record discloses that there was no reasonable alternative, or there is some other reasonable explanation, so let's move on.

Next, the court considers whether it was error to consider two licenses the plaintiffs had entered into with Facebook and RIM, in settlement of litigation, as comparables.  The court agrees that the Facebook license (the features of which the court does not discuss) was not comparable, but notes that Samsung did not argue for the inadmissibility of the RIM license, and finds (again without detailed discussion) that the license was relevant.

Finally, the court addresses Summit's cross-appeal that the jury-awarded reasonable royalty should not have been considered compensation for both past and future infringement:
. . . Summit also argues that its equitable claim for future damages is not an issue for the jury. Thus, Summit concludes that it is entitled to recover damages for future infringement. We disagree. This court has not directly addressed whether a jury can award lump-sum damages through the life of the patent. We have, however, permitted such relief. . . .
In this case, the district court properly denied Summit’s request for an ongoing royalty because the jury award compensated Summit for both past and future infringement through the life of the patent. Samsung’s expert, Mr. Martinez, testified that a lump-sum award was appropriate. J.A. 7089-90. He also testified regarding the weight the jury should give the license agreements introduced into evidence, all of which were lump-sum licenses. Moreover, Summit’s expert, Mr. Benoit, admitted that a lump-sum award would compensate Summit through the life of the patent. J.A. 6452, 6479-80. When the jury returned its verdict, it indicated on the verdict form that the award was a lump sum by writing “lump sum” on the verdict form. We see no basis to disturb the district court’s determination and hold that the district court did not abuse its discretion in denying Summit’s request for an ongoing royalty.
The issue of whether an ongoing royalty is equitable or legal relief nevertheless is a tricky one, in my view--see, e.g., my comment on Judge Moore's comment on this issue in the Apple v. Samsung oral argument earlier this year--though the court may be right that if the jury viewed the award as compensation for past and future infringement, there should be no problem. 

Monday, September 21, 2015

Federal Circuit Retains Laches Defense to Claims for Patent Damages

Last year in a copyright case, Petrella v. Metro-Goldwyn-Mayer, the U.S. Supreme Court held that "the equitable defense of laches (unreasonable, prejudicial delay in commencing suit)" does not bar a claim for damages occurring within three years of filing suit, though "[a]s to equitable relief, in extraordinary circumstances, laches may bar at the very threshold the particular relief requested by the plaintiff. And a plaintiff’s delay can always be brought to bear at the remedial stage, in determining appropriate injunctive relief, and in assessing the “profits of the infringer . . . attributable to the infringement.” (For my blog post on the case, see here).  The Court left open the possibility, however, that (as the Federal Circuit had earlier held in the Aukerman case) laches might bar a patent infringement claim brought within patent law's six-year statute of limitations.  Late last year, the Federal Circuit decided to hear en banc SCA Hygiene Products Aktiebolag v. First Quality Baby Products, LLC, to determine whether laches remains a viable defense to a patent claim after Petrella.  This past Friday, in an opinion by Chief Judge Prost, a majority of the court held that the answer is yes (link to opinion here):
We conclude that Congress codified a laches defense in 35 U.S.C. § 282(b)(1) that may bar legal remedies. Accordingly, we have no judicial authority to question the law’s propriety. Whether Congress considered the quandary in Petrella is irrelevant—in the 1952 Patent Act, Congress settled that laches and a time limitation on the recovery of damages can coexist in patent law. We must respect that statutory law.
Nevertheless, we must adjust the laches defense in one respect to harmonize it with Petrella and other Supreme Court precedent. We emphasize that equitable principles apply whenever an accused infringer seeks to use laches to bar ongoing relief. Specifically, as to injunctions, considerations of laches fit naturally within the eBay framework. In contrast, Menendez v. Holt, 128 U.S. 514 (1888), and Petrella counsel that laches will only foreclose an ongoing royalty in extraordinary circumstances.
So unreasonable, prejudicial delay in filing suit can preclude the recovery of damages for past infringement, even if the plaintiff seeks damages only for losses caused within the six years prior to the filing of the complaint.  In reaching this conclusion, the majority mostly relies on legislative history and similar materials to distinguish the patent context from the copyright context at issue in Petrella; but it also notes that copyright infringement requires proof of copying, whereas patent law does not, thus arguably creating a greater risk that a patent infringement defendant could suffer undue harm from the plaintiff's unreasonable delay in filing suit.  As for injunctive relief and ongoing royalties, however, the majority has this to say (pp. 38-41):
Many of the facts relevant to laches, such as the accused infringer’s reliance on the patentee’s delay, fall under the balance of the hardships factor. Id. Unreasonable delay in bringing suit may also be relevant to a patentee’s claim that continued infringement will cause it irreparable injury. More than anything, district courts should consider all material facts, including those giving rise to laches, in exercising its discretion under eBay to grant or deny an injunction. See eBay, 547 U.S. at 394. . . .
With respect to ongoing royalties, while the principles of equity apply, equity normally dictates that courts award ongoing royalties, despite laches. Menendez, an influential case contrasting laches and equitable estoppel in the trademark context, guides us here. According to Menendez, delay in exercising a patent right, without more, does not mean that the patentee has abandoned its right to its invention. Rather, the patentee has abandoned its right to collect damages during the delay. Equitable estoppel, on the other hand, is different—the patentee has granted a license to use the invention that extends throughout the life of the patent . . . .
In sum, we must recognize “the distinction between . . . estoppel and laches . . . .” Id. (first alteration in original). Whereas estoppel bars the entire suit, laches does not. As outlined above, laches in combination with the eBay factors may in some circumstances counsel against an injunction. However, a patentee guilty of laches typically does not surrender its right to an ongoing royalty.
Judges Hughes, Moore, Wallach, Taranto, and Chen dissented from the principal holding that laches remains a defense to a claim for past patent damages, stating that "The Supreme Court has repeatedly cautioned this court not to create special rules for patent cases."  They agree, however, that in an appropriate case laches can bar equitable relief.

To be honest, I don't have a strong inclination one way or the other on this issue, but I would note that a group of law professors, including Professor Samuel Bray (whose work I've mentioned here in the past), filed an amicus brief arguing that the court should not recognize laches as a defense to a claim for past damages.  For coverage on Patently-O, see here.

Friday, September 18, 2015

Speaking Engagement Today on Antitrust/IP Issues

From 3:30 to 4:30 this afternoon I will be on a panel with Bethany Krueger of Greene Espel and Scott Flaherty of Briggs & Morgan at the 2015 Midwest IP Institute in Minneapolis.  The title of our panel is "What You Need to Know About Antitrust Developments and How They Relate to IP."  After a brief overview of the relationship of antitrust to IP, we will be covering the Supreme Court's recent decision in Kimble (see my rather critical blog post here); FRAND issues; potential claims arising from cease-and-desist letters; and reverse payments.  As always, I will be happy to meet any of my readers who happen to be around.

Thursday, September 17, 2015

Federal Circuit Vacates Denial of Injunction in Apple v. Samsung

Again, here is a link to the opinion.  The appeal involves three patents, including the one with the "slide to unlock" feature.  Judge Moore wrote the majority opinion, and the key issue on appeal is whether there was a sufficient "causal nexus" between Samsung's infringement and Apple's alleged lost sales, i.e., whether the infringement caused Apple to suffer irreparable harm.  Here is the key passage from Judge Moore's opinion (pp. 10-12):
When a patentee alleges it suffered irreparable harm stemming from lost sales solely due to a  competitor’s infringement, a finding that the competitor’s infringing features drive consumer demand for its products satisfies the causal nexus inquiry. In that case, the entirety of the patentee’s alleged  harm weighs in favor of injunctive relief. Such a showing may, however, be nearly impossible from an evidentiary standpoint when the accused devices have thousands of features, and thus thousands of other potential causes that must be ruled out. Nor does the causal nexus requirement demand such a showing. Instead, it is a flexible analysis, as befits the discretionary nature of the four-factor test for injunctive relief. We have explained that proving a causal nexus requires the patentee to show “some connection” between the patented features and the demand for the infringing products.  Apple III, 735 F.3d at 1364./1  Thus, in a case involving phones with hundreds of thousands of available features, it was legal error for the district court to effectively require Apple to prove that the infringement was the sole cause of the lost downstream sales. The district court should have determined whether the record established that a smartphone feature impacts customers’ purchasing decisions. Apple III, 735 F.3d at 1364. Though the fact that the infringing features are not the only cause of the lost sales may well lessen the weight of any alleged irreparable harm, it does not eliminate it entirely. To say otherwise would import a categorical rule into this analysis.
/1  As we explained in Apple III, “some connection” between the patented feature and consumer demand for the products may be shown in “a variety of ways,” including, for example, “evidence that a patented feature is one of several features that cause consumers to make their purchasing decisions,” “evidence that the inclusion of a patented feature makes a product significantly more desirable,” and “evidence that the absence of a patented feature would make a product significantly less desirable.” Id. These examples do not delineate or set a floor on the strength of the connection that must be shown to establish a causal nexus; rather, they are examples of connections that surpass the minimal connection necessary to establish a causal nexus. Apple III included a fourth example to demonstrate a connection that does not establish a causal nexus—where consumers are only willing “to pay a nominal amount for an infringing feature.” Id. at 1368 (using example of $10 cup holder in $20,000 car). There is a lot of ground between the examples that satisfy the causal nexus requirement and the example that does not satisfy this requirement. The required minimum showing lies  somewhere in the middle, as reflected by the “some connection” language.
Judge Moore then praises the virtues of property rights and exclusivity (p.12):
The right to exclude competitors from using one’s property rights is important. And the right to maintain exclusivity—a hallmark and crucial guarantee of patent rights deriving from the Constitution itself—is likewise important. “Exclusivity is closely related to the fundamental nature of patents as property rights.” Douglas Dynamics, 717 F.3d at 1345. And the need to protect this exclusivity would certainly be at its highest when the infringer is one’s fiercest competitor. Essentially barring entire industries of patentees—like Apple and other innovators of many-featured products—from taking advantage of these fundamental rights is in direct contravention of the Supreme Court’s approach in eBay. 547 U.S. at 393 (“[E]xpansive principles suggesting that injunctive relief could not issue in a broad swath of cases . . . cannot be squared with the principles of equity adopted by Congress.”).
As a result, she writes, "The district court thus erred when it required Apple to prove that the infringing features were the exclusive or predominant reason why consumers bought Samsung’s products to find irreparable harm," and that it "should have considered whether there is 'some connection' between the patented features and the demand for Samsung’s products," that is, that it "should have required required Apple to show that the patented features impact consumers’ decisions to purchase the accused devices" (p.12).  Moreover, Judge Moore writes, "the record here establishes that these features do influence consumers’ perceptions of and desire for these products" (p.13), after which she discusses evidence that she believes indicated that Samsung copied, a matter that on the facts of this case was relevant to the issue of whether "carriers or users valued those features" (pp. 13-15).  She also notes Apple's expert's "conjoint study, which established that consumers would not have purchased a Samsung phone if it lacked the patented features, that they valued these features, and that they were willing to pay considerably more for a phone that contained these features" (p.15)--thus perhaps giving a boost to future uses of conjoint studies in matters relating to patent remedies (a topic I have blogged about here and here).

Having concluded that the irreparable harm factor weighed in Apple's favor, Judge Moore also concludes that the "inadequate remedy at law" factor does too (not surprising, since those factors more or less mean the same thing), given the difficulty in quantifying "the extent of Apple's downstream and network effect losses" (p.18).  The court then agrees with Judge Koh that the balance of hardships and public interest factors weighed in favor of Apple.  In discussing the public interest factor in particular, Judge Moore again stresses the value of property rights and exclusivity (p.21):
. . . the public generally does not benefit when that competition comes at the expense of a patentee’s investment-backed property right. To conclude otherwise would suggest that this factor weighs against an injunction in every case, when the opposite is generally true. We base this conclusion not only on the Patent Act’s statutory right to exclude, which derives from the Constitution, but also on the importance of the patent system in encouraging innovation. Injunctions are vital to this system. As a result, the public interest nearly always weighs in favor of protecting property rights in the absence of countervailing factors, especially when the patentee practices his inventions. 
The result is a remand that presumably will result in an injunction conditioned (as Apple proposed) on Samsung having 30 days to design around the patents at issue.  

If Judge Moore's opinion ultimately carries the day (I imagine there may be a request for rehearing en banc or a cert petition, and if so I don't know what to predict), this could signal to the district courts that at least some of the judges on the Federal Circuit are eager to reinvigorate injunctive relief, which at present is granted about 75% of the time to the prevailing patent owner.  All the more so given Judge Reyna's concurring opinion, in which he writes (pp. 4-5):
Though we read eBay to overrule our presumption of irreparable injury, we cautioned that courts should not necessarily “ignore the fundamental nature of patents as property rights granting the owner the right to exclude.” Robert Bosch LLC v. Pylon Mfg. Corp., 659 F.3d 1142, 1149 (Fed Cir. 2011). Yet our recent cases have done precisely that, ignoring the right to exclude in determining whether to issue an injunction. . . .
I believe that this recent trend extends eBay too far. Infringement on the right to exclude is, in my view, an “injury” that is sometimes irreparable. An “injury” is not limited to tangible violations but rather encompasses “violation[s] of another's legal right, for which the law provides a remedy; a wrong or injustice.” 
There is no reason to treat patent rights differently. 
Actually, I can think of reasons why it might be desirable to treat patents differently, the principal one being their utilitarian nature:  they are a means to an end, and thus the law of remedies for their infringement should turn exclusively on economic factors, among them the risk (or not) of holdup and the ability (or not) of the courts to adequately preserve the patent incentive by awarding compensatory damages.  In other words, I'd rather see the discussion turn (as it often does in antitrust law) on economics than on formalistic invocations of the sanctity of property.  (To be fair, Judge Reyna isn't making a purely formalistic argument--see his opinion at pp. 6-7, for example--but I am concerned about how all of this constitutional and property-based rhetoric is going to be used in the future.  And Judge Reyna, unlike Judge Moore who does not reach this issue, would find that Apple was threatened with injury to its reputation as an innovator, even without any empirical evidence to substantiate this, see pp. 10-18 of his concurrence.)

Judge Prost's strongly worded dissent seems consistent with her previous pronouncements on the "causal nexus" issue in previous litigation between these parties.  Here's her opening salvo (pp. 1-2):
This is not a close case. One of the Apple patents at issue covers a spelling correction feature not used by Apple. Two other patents relate to minor features (two out of many thousands) in Apple’s iPhone—linking a phone number in a document to a dialer, and unlocking the screen. Apple alleged that it would suffer irreparable harm from lost sales because of Samsung’s patent infringement. For support, Apple relied on a consumer survey as direct evidence, and its allegations of “copying” as circumstantial evidence. The district court rejected both evidentiary bases. On the record of this case, showing clear error in the district court’s factual findings is daunting, if not impossible. 
She also disputes the majority's findings on the issues of carrier and user preferences and copying as not being supported by the evidence (pp. 7-12).

Again, we'll see what happens, but I wonder if this case will be taken as a signal to the district courts to be more willing to grant injunctions in cases involving component patents, that is, patents that make up but one feature of a product that may embody many more patented and unpatented technologies.  Perhaps, if as Samsung asserted at oral argument it can easily design around the patents in suit and at present only sells one product that incorporates any of them (majority op. pp. 5, 20), it would have made more sense to resolve the case on narrower grounds rather than making sweeping claims about the wonders of injunctive relief; but so it goes.

One other thing I would note as well:  some previous descriptions of the "causal nexus" requirement might have led one to think that injunctions would rarely issue in cases in which the patent owner cannot demonstrate that the patented feature at issue sufficiently "drives the demand" for the product to satisfy the entire market value rule (though even Judge Prost has stated that that is not necessarily the case, see discussion on this blog here).  In any event, the majority opinion here seems to dispel any such notion.

Finally, I must confess that I called this one wrong:  I thought the Federal Circuit would affirm.  See here.

Breaking News: Federal Circuit Vacates Order Denying Apple an Injunction Against Samsung

Here's a link to the opinion, and for my previous blog posts on this particular Apple v. Samsung matter (the one involving the slide-to-unlock patent, among others, in which a jury awarded Apple $120 million in damages in May 2014), case see here, here, and here.  Back with more later.

Wednesday, September 16, 2015

Mazzeo, Ashtor & Zyontz on NPE Damages Awards

This paper has been out for a while, but I only recently came across it (hat tip to Michael Risch) and thought it might interest readers who haven't seen it yet.  The authors are Michael Mazzeo, Jonathan Hillel Ashtor, and Samantha Zyontz, and the paper is titled Do NPEs Matter?  Non-Practicing Entities and Patent Litigation Outcomes, 9 Journal of Competition Law & Economics 879 (2013).  Here is the abstract:
It is widely argued that so-called “patent trolls” are corrupting the U.S. patent system and endangering technology innovation and commercialization at large. For example, a recent White House report argued that “trolls” hurt firms of all sizes and advocated for specific policies aimed at curtailing practices thought to be particularly harmful. Yet the existence and extent of any systematic effects of so-called “troll-like” behavior, and the implications of modern patent assertion practices by Non-Practicing Entities (“NPEs”), remains unclear. This article develops novel empirical evidence to inform the debate over NPEs on patent litigation. Specifically, we conduct a large-scale empirical analysis of more than 1,750 patent infringement cases decided by a judge or jury in U.S. district courts between 1995 and 2011.We focus on case outcomes, including findings of validity and infringement, and the distributions and values of resulting damage awards. We find some relatively small differences in terms of lower success rates and award values in cases where the patent holders are NPEs. Yet across the subset of cases in which damages are awarded to the patent holders, we find no significant differences in the distribution of awards between NPEs and practicing entities. Nonetheless, there are substantial differences in litigation behavior,  success rates, and award values among types of NPEs (that is, universities, individuals, and Patent Assertion Entities (“PAEs”)). Moreover, we find evidence of certain NPEs engaging in strategic and rational patent acquisition, assertion, and settlement-licensing practices. We posit that these practices may reflect, or perhaps derive from, the economic separation of patent rights from their underlying technologies that is represented in NPE approaches to patent assertion.
To put the paper in context, in a previous paper about which I blogged here, Explaining the “Unpredictable”:  An Empirical Analysis of U.S. Patent Infringement Awards, 35 International Review of Law & Economics 58 (2013), the three authors reviewed, among other things, “340 patent infringement damage awards granted by a judge or jury in United States district courts from 1995 to 2008 . . . derived from a proprietary dataset owned by” PricewaterhouseCoopers (PwC), and performed regression analyses that appeared to explain between 64% and 77% of the variation in the observed patent damage awards.  (Variables observed to have the greatest association with higher damages awards include the number of patents in suit, the average age of the patent, the average number of claims, the average number of forward citations, whether the defendant is a public company, whether the trial was to a jury, and the time to trial.)  The NPE paper is a follow-up, involving 261 observations from 1995 through 2008, to test whether NPE status is independently associated with higher damages awards.  The authors' regression analyses indicate that once the value-associated factors identified in the earlier study are taken into account, there was no significant difference between awards to NPEs and awards to practicing entities over the time periods studied:  "Our analysis suggests that decided cases involving NPEs do not resolve differently than cases that involve practicing entities as judged along various dimensions. Patent holder success rates are somewhat lower for NPE cases than for non-NPE cases and, controlling for other factors, the damages awarded in cases with valid and infringed patents are somewhat smaller (though not statistically significantly so)" (pp. 901-02). 

The authors also state their intent to “revisit these regressions with more complete data in future work.”  (I understand that one follow-up paper by Mr. Ashtor will soon be published in the Stanford Technology Law Review, and that one or more others may follow.)  The PwC annual patent litigation studies  (see my blog posts here and here), indicate that in recent years median damages awards to NPEs have tended to be higher than awards to practicing entities, so a follow-up study using more recent data would be useful to further test whether, since 2008, NPE status alone has been a significant explanatory factor.