Maxell v. Samsung: Defense Verdict Across 7 Patents After 750-Day Trial
Maxell, Ltd. brought a broad patent infringement action against Samsung Electronics in the Eastern District of Texas, asserting 7 patents spanning smart home appliances, smartphones, and connected device technology. After a jury verdict on May 28, 2025 and post-trial motions, the court entered final judgment finding Samsung did not infringe any asserted claim across five patents, with two patents also invalidated.
Maxell’s broad IP campaign against Samsung ends in complete defense victory
Maxell, Ltd., a Japanese IP licensing entity spun out of Hitachi, filed suit against Samsung Electronics Co., Ltd. and its U.S. subsidiary Samsung Electronics America, Inc. on September 7, 2023 in the Eastern District of Texas (Marshall Division) before Judge Robert W. Schroeder III. Maxell asserted seven U.S. patents covering technology embedded across Samsung’s entire consumer electronics portfolio — from Galaxy smartphones and tablets to smart refrigerators, washers, dryers, ranges, and connected SmartThings ecosystem devices.
After a 750-day litigation, the jury returned a verdict on May 28, 2025. Final judgment, entered on September 26, 2025 pursuant to a joint motion, found Samsung did not infringe the asserted claims of U.S. Patent Nos. 8,982,086, 11,017,815, 10,176,848, 10,129,590, and 11,223,757. Additionally, claims of the ‘815 patent were found invalid as obvious and claim 1 of the ‘086 patent was found invalid for lack of written description. Maxell’s requests for entry of judgment, enhanced damages, pre-judgment interest, post-judgment interest, and a permanent injunction were all denied.
The scope of Maxell’s assertion — over 200 named Samsung products across seven technology domains — is consistent with the aggressive, portfolio-wide licensing strategy common among NPEs targeting large consumer electronics companies. The conditional grants and withdrawals embedded in the final judgment (including Samsung’s conditionally granted new trial request on invalidity and conditionally withdrawn prosecution laches defense) suggest the parties may have reached a parallel commercial arrangement, though the public record does not confirm this. The 750-day duration reflects the complexity of a multi-patent, multi-product case of this scale at EDTX.
Filing to Judgment on the merits for Defendant in 750 days
750 days from filing to final judgment — above the EDTX median for multi-patent cases
Final judgment for Samsung: what the verdict means for both parties
Jury verdict of non-infringement, confirmed by final judgment
The jury returned a verdict of non-infringement on May 28, 2025 across all asserted claims of five patents. The court entered final judgment on September 26, 2025 pursuant to a joint motion under Rules 58 and 60(b), giving the verdict binding legal effect. Two of the asserted patents — the ‘815 and ‘086 — were also found invalid, providing Samsung with additional defensive insulation beyond the non-infringement findings.
Merits adjudication — defendant prevailsMaxell receives no damages, no injunction, and two patents invalidated
The final judgment denies all of Maxell’s requested relief — damages, enhanced damages, pre-judgment interest, post-judgment interest, and a permanent injunction. Beyond the immediate case, two patents in Maxell’s portfolio (the ‘815 and ‘086) now carry invalidity findings, reducing their value for future assertion against Samsung or third parties. Maxell retains appellate rights, and the conditional posture of certain rulings suggests the parties anticipated further proceedings.
All relief denied — portfolio weakenedSamsung wins clean across all asserted claims in a major IP dispute
Samsung secured non-infringement findings across all five actively adjudicated patents and invalidity rulings on two. Its request for a new trial on invalidity was conditionally granted, preserving additional defensive options if the case continues on appeal. The prosecution laches defense on the ‘815 patent was conditionally withdrawn with rights reserved — a calculated preservation move. Samsung’s entire consumer electronics product line, spanning smartphones, appliances, and smart home devices, remains unencumbered by this litigation.
Full defense victory — product lines clearedEDTX delivers a high-profile NPE defeat in smart home and mobile IP
This outcome suggests that even in the Eastern District of Texas — historically plaintiff-friendly — well-resourced defendants can defeat broad NPE assertions when patents are challenged on both infringement and validity grounds simultaneously. For competitors operating in smart appliance, smartphone, and IoT connectivity markets, the invalidity findings on the ‘815 and ‘086 patents may narrow Maxell’s future licensing leverage. Companies facing similar Maxell assertions should monitor appellate developments closely.
NPE enforcement risk recalibratedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Maxell, Ltd. | Company | Japanese IP licensing entity — holder of US8982086, US11017815, US10176848, US10129590, US11223757, and 2 further patentsSearch in Eureka ↗ |
| Defendant | Samsung Electronics Co., Ltd. | Company | Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc. — global consumer electronics manufacturerSearch in Eureka ↗ |
| Co-Defendant | Samsung Electronics America, Inc. | Company | Search in Eureka ↗ |
| Plaintiff counsel | Alan M. Grimaldi | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Alison T. Gelsleichter | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Amanda Streff Bonner | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Andrew J. Pincus | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Bryan Christopher Nese | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Clark Bakewell | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Courtney M. Krawice | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Geoffrey Patton Culbertson | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | James A. Fussell , III | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Jamie B. Beaber | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Kelly B. Tidwell | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Kfir B. Levy | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Michael L. Lindinger | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Minh Nguyen-Dang | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Nicole A. Saharsky | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Robert Gary Pluta | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Saqib Javaid Siddiqui | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Seke Gnahoua Godo | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Seth Weston Bruneel | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | So Ra Ko | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Tariq Javed | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Tatsuya Koyama | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Tiffany A. Miller | Attorney | Counsel for Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Mayer Brown LLP | Law Firm | Representing Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Mayer Brown, LLP – Chicago | Law Firm | Representing Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Mayer Brown LLP (DC) | Law Firm | Representing Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Patton Tidwell & Culbertson LLP | Law Firm | Representing Maxell, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Patton Tidwell & Culbertson LLP (Texarkana) | Law Firm | Representing Maxell, Ltd.Search in Eureka ↗ |
| Defendant counsel | Andrew Thompson (Tom) Gorham | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Benjamin Shafer Mueller | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Brian K. Erickson | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Erik R. Fuehrer | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Erin P Gibson | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Gianni Minutoli | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Harry Lee Gillam , Jr. | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Helena D. Kiepura | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | James M. Heintz | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Jesse Hindman | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Kathryn Riley Grasso | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Mark D. Fowler | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Martin Ellison | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Melissa Richards Smith | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Michael D. Jay | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Paulina Starostka | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Roshan Kumar Bhattarai | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Sangwon Sung | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Sean C. Cunningham | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Stanley J Panikowski | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Tessa Duxbury | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant law firm | DLA Piper LLP (US) | Law Firm | Representing Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant law firm | DLA Piper US LLP (Los Angeles) | Law Firm | Representing Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant law firm | Dla Piper, LLP (US)- Reston | Law Firm | Representing Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant law firm | DLA Piper, LLP (US) | Law Firm | Representing Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant law firm | Edleson & Hindman | Law Firm | Representing Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant law firm | Gillam & Smith, LLP | Law Firm | Representing Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant law firm | Gilliam & Smith LLP | Law Firm | Representing Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Presiding judge | Judge Robert W. Schroeder, III | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The final judgment reflects a comprehensive defense outcome: Samsung was found not to infringe any asserted claim across five patents, with two patents independently invalidated on obviousness and written description grounds. The joint motion structure and the conditional posture of Samsung’s new trial requests and prosecution laches withdrawal are procedurally notable — they preserve appellate optionality for both parties while formally closing the case. The denial of all Maxell relief, including the injunction request, means Samsung faces no immediate operational constraint on the accused product lines.
US8982086 — smart device display and interface technology
The seven asserted patents — U.S. Patent Nos. 8,982,086; 11,017,815; 10,176,848; 10,129,590; 11,223,757; 11,445,241; and 8,037,161 — collectively cover a range of technologies embedded in connected consumer electronics, including smart home appliance control interfaces, audio/video data handling, network connectivity management, display and touch interaction, and power management. The application dates span from approximately 2007 to 2020, reflecting both legacy Hitachi IP and more recently filed continuation-type patents. This temporal spread is typical of NPE portfolios assembled to capture successive product generations.
The breadth of Maxell’s assertion — covering Galaxy smartphones, tablets, foldables, smartwatches, smart refrigerators, washers, dryers, ranges, dishwashers, air purifiers, laptops, and the SmartThings IoT ecosystem — reflects a deliberate strategy to maximize royalty base rather than target a narrow technical feature. For competitors in the smart home and mobile device markets, the invalidity findings on the ‘815 and ‘086 patents are strategically significant: they may limit Maxell’s ability to assert these patents against other defendants and open prior art windows for IPR petitions. Companies developing connected appliance platforms or IoT device ecosystems should monitor Maxell’s remaining portfolio closely.
Should you run an FTO against US8982086 and the Maxell smart home portfolio?
Any company developing or commercializing smart home appliances, connected mobile devices, IoT hubs, or multi-device network control interfaces should treat the Maxell patent portfolio as a live enforcement risk. Despite Samsung’s full defense win, only five of seven asserted patents received merits adjudication — and Maxell retains appellate rights. The ‘848, ‘590, and ‘757 patents received non-infringement findings but no invalidity rulings, meaning they remain valid and potentially assertable against other defendants in the smart appliance and smartphone space.
PatSnap Eureka’s FTO Search Agent enables R&D and product teams to map claim scope across the Maxell portfolio against your product architecture before a demand letter arrives. Eureka can identify prior art gaps relevant to the surviving patents, flag continuation filing activity that may generate new assertions, and surface comparable NPE litigation patterns in the EDTX and ITC venues. Running a proactive FTO now — informed by the claim constructions and invalidity arguments developed in this trial record — is significantly more cost-effective than defending a similar multi-patent assertion.
Run a freedom-to-operate analysis on US10176848B2 to assess your product’s exposure
Run FTO in Eureka →Similar smart home and mobile patent infringement cases in EDTX
Cases involving NPE assertion of smart appliance, smartphone, and IoT connectivity patents before the Eastern District of Texas, with comparable multi-patent, multi-product scope.
What Maxell v. Samsung signals for smart home and mobile IP enforcement
A 7-patent NPE assault across 200+ Samsung products ends with no damages awarded — a significant data point for IP strategy in consumer electronics.
Multi-patent NPE assertions face heightened invalidity risk at trial
Maxell’s simultaneous assertion of 7 patents across a vast product range is consistent with a licensing-pressure strategy. However, the jury found invalidity on the ‘815 and ‘086 patents, demonstrating that broader assertions can create more prior art exposure. Companies defending against portfolio NPE suits should invest early in IPR filings and validity analysis to create parallel pressure.
EDTX outcomes remain unpredictable even for established NPE plaintiffs
Despite Eastern District of Texas’s plaintiff-friendly reputation, Samsung secured a complete defense verdict. This is consistent with a broader trend of large defendants investing heavily in EDTX jury preparation. In-house teams should not assume venue alone determines outcome — claim scope, product mapping, and written description quality are decisive at trial.
Maxell v Samsung — key questions answered
Final judgment was entered for Samsung on September 26, 2025. The jury found Samsung did not infringe the asserted claims of five patents (US8982086, US11017815, US10176848, US10129590, US11223757). Additionally, claims of the ‘815 patent were found invalid as obvious and claim 1 of the ‘086 patent was found invalid for lack of written description. All of Maxell’s requests for damages and injunctive relief were denied.
Maxell accused over 200 Samsung products including Galaxy smartphones (S-series, A-series, Z Fold/Flip foldables), Galaxy tablets, Galaxy smartwatches, Galaxy laptops, smart refrigerators (including Bespoke lines), washers, dryers, gas and electric ranges, dishwashers, microwaves, air purifiers, AirDressers, SmartThings Hub devices, and other connected home appliances — effectively Samsung’s entire consumer electronics portfolio.
US Patent No. 11,017,815 (claims 1, 21, and 24) was found invalid as obvious. US Patent No. 8,982,086 (claim 1) was found invalid due to lack of written description. The remaining asserted patents — US10176848, US10129590, and US11223757 — received non-infringement findings but were not adjudicated on validity in the final judgment.
The final judgment includes several conditional rulings: Samsung’s new trial request on noninfringement of the ‘086, ‘815, and ‘848 patents was conditionally denied, while its new trial request on invalidity of the ‘086 and ‘815 patents was conditionally granted. Samsung’s prosecution laches defense on the ‘815 patent was conditionally withdrawn with rights reserved. These conditionals are procedurally unusual and suggest the parties may have anticipated appeal or a parallel commercial resolution, though the public record does not confirm the latter.
Yes. The entry of final judgment under Rule 58 triggers Maxell’s right to appeal to the U.S. Court of Appeals for the Federal Circuit. The conditional structure of certain rulings — particularly Samsung’s preserved invalidity new trial right and its reserved prosecution laches defense — suggests both parties anticipated appellate proceedings. Any Federal Circuit appeal would apply a substantial evidence standard to the jury’s factual findings and a de novo standard to any legal issues, including claim construction.
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