Plaintiff
40 cases as plaintiff.
Maxell, Ltd. (often shortened to Maxell) is a Japanese public company, traded on the Tokyo Stock Exchange (TYO: 6810), that manufactures consumer electronics, energy products, and industrial materials. Founded in September 1960, its headquarters are in Tokyo and Kyoto, Japan. As of March 31, 2026, Maxell reported 3,765 consolidated employees. In the fiscal year ending March 2026, Maxell's revenue was ¥129.43 billion (approximately $858 million USD).
Maxell's product portfolio is diversified across three main segments: energy, industrial materials, and electronic appliances and consumer products. Key offerings include primary and rechargeable batteries (including advanced all-solid-state batteries), data storage devices, optical lenses, LCD and laser projectors, headphones, wireless charging products, and functional materials like adhesive tapes and inks. The company has a historical legacy in recording media such as audio cassettes and floppy disks.
Maxell exhibits an active two-way patent litigation posture, acting as both a plaintiff and a defendant in patent disputes. The company explicitly states its strategy to obtain licensing fees by licensing its intellectual property to other companies and is prepared to take legal action when its IP is not respected. Maxell has been recognized for its IP-centric business strategy, being selected for the "Asia IP Elite" by Intellectual Asset Management (IAM) since 2018.
Maxell's tracked cases include a plaintiff suit against Samsung Electronics Co., Ltd. et al. in the U.S. District Court for the Eastern District of Texas, initiated in 2025. This district is known for its plaintiff-friendly reputation in patent litigation. Maxell secured a significant jury verdict of $111.7 million against Samsung in a related case in the Eastern District of Texas in 2025, concerning patents for smart device technologies such as unlocking devices, locating recordings, and managing digital data. Maxell also appears as a defendant in a 2025 case before the Patent Trial and Appeal Board (PTAB) brought by Samsung Electronics Co., Ltd. Additionally, Maxell has been involved in litigation concerning lithium-ion battery patents, with one case against Amperex Technology, Ltd. seeing the Federal Circuit affirm the unpatentability of a Maxell patent in early 2025, while another Federal Circuit decision in 2024 reversed a district court's indefiniteness ruling concerning a Maxell rechargeable lithium-ion battery patent.
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Maxell, Ltd. filed a patent infringement suit against Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc. The case is ongoing, with Samsung having filed a motion to stay proceedings pending inter partes reviews, including one related to US patent 10812646.
This district court case, filed by Maxell against Samsung, asserts ten patents, including US10783228, targeting various products and features such as smartphones, smart home hubs, camera modes, and media streaming. Samsung filed motions to stay the case pending Inter Partes Review proceedings for all ten asserted patents.
Maxell, Ltd. sued Samsung Electronics Co., Ltd. for infringement. A $112M verdict from May 2025 was overturned in November 2025, but the case remains active with ongoing proceedings, including a scheduled Markman Hearing and Pretrial Conference.
Section 337 investigation brought by Maxell against TCL group entities asserting U.S. Patent 10,958,971 and other patents. Following partial terminations, the ALJ granted a joint motion to terminate the entire investigation on settlement; the Commission declined review in Sept. 2025.
Maxell asserted nine U.S. patents, including U.S. 8,736,729, against LG smartphones, tablets, and Gram laptops. Originally filed in E.D. Tex., the case was transferred to N.D. Cal. and closed on July 2, 2025, after a stipulation of dismissal, consistent with a settlement.
Maxell sued Samsung for infringement of multiple patents, including U.S. 11,017,815. A May 2025 jury found willful infringement of '815 claims 1, 21, and 24 and awarded $111,720,099 total, but the court later granted JMOL of non-infringement for the three tried patents, overturning the verdict; Maxell appealed.
ITC Section 337 investigation by Maxell against VIZIO asserting multiple patents, including U.S. 8,170,394. The investigation was terminated in its entirety by settlement after the Commission declined review on September 25, 2023.
Maxell sued Lenovo and Motorola in the Western District of Texas asserting the '284 Patent. The docket shows the case terminated June 29, 2023, with case flags CLOSED and STAYED; no merits judgment was entered, consistent with resolution/settlement.
ITC investigation asserting US 7,199,821 against Lenovo and Motorola entities. Terminated in its entirety based on complainant's withdrawal; review of ALJ ID No. 10 was declined.
Maxell sued Apple Inc.; Google Patents/Unified Patents litigation data associates this case with U.S. 7,072,673, though the narrative could not independently confirm the '673 patent from the retrieved complaint text. The case was dismissed with prejudice on April 1, 2021.
Maxell asserted twelve patents, including U.S. 8,736,729 as Exhibit 3. The case was dismissed with prejudice on April 1, 2021, on the parties' joint motion, with each side bearing its own fees and costs.
Maxell, Ltd. sued Apple Inc. for patent infringement in the Western District of Texas, Waco Division. The case is closed.
Maxell asserted multiple patents, including U.S. 10,176,848, against Apple. The action was stayed pending the parallel ITC action and later dismissed with prejudice on joint motion.
Maxell asserted ten patents, including the '794 patent, against Apple over its Low Power Mode. The '794 claims were dismissed without prejudice on March 22, 2021, and the overall case settled in March 2021.
Maxell sued ASUSTeK, and the case was dismissed with prejudice on May 2, 2019. The '491 patent's litigation record lists this case as a '491 matter, but that linkage is not independently verified; Docket Alarm tagged the case to US 7,995,897 and RPX lists five patents-in-suit.
Maxell, Ltd. sued ASUSTeK Computer Inc. in the Eastern District of Texas, asserting the '616 patent as one of the patents-in-suit in its camera/consumer-electronics campaign. The case was dismissed with prejudice on May 2, 2019, after the parties notified the court of settlement.
Maxell asserted U.S. Patent 7,995,897 against Huawei entity defendants. The '897 patent was listed on the AO-120 § 290 report and in the consolidated P.R. 4-3 claim-construction statement; the case was consolidated with No. 5:18-cv-00034 for pretrial.
Maxell asserted U.S. Patent 7,995,897 against ZTE entity defendants. The '897 patent appears in the AO-120 and consolidated P.R. 4-3 claim-construction record; final disposition was not verified.
Maxell sued Huawei Device USA and Huawei Device Co. in the Eastern District of Texas. Google Patents/Unified Patents linked the case to US 7,324,487, but the narrative could not retrieve the full asserted-patent list; the case was dismissed as settled on April 4, 2019.
Maxell sued ZTE Corp. and ZTE USA Inc. in the Eastern District of Texas, Texarkana Division. Google Patents/Unified Patents linked the case to US 7,324,487, but the narrative could not retrieve the full asserted-patent list; the case was terminated on March 12, 2019.
Companion infringement action to Olympus's declaratory judgment case; Maxell accused Olympus of infringing the '209 Patent. The cases were treated as associated (same judges, parties, and accused products) and resolved as part of the same 2018 settlement.
Maxell, Ltd. filed an infringement action against Olympus Corporation and Olympus America Inc. in the District of Delaware. The action was related to and consolidated for discovery/Markman with the Olympus declaratory-judgment action, No. 1:18-cv-00216. The outcome was not confirmed in the retrieved sources.
Maxell sued BlackBerry Corporation and BlackBerry Ltd. in Delaware district court. BlackBerry filed an IPR on the '394 patent and the parties settled, with the case dismissed/closed on March 29, 2019.
Maxell's patent infringement action against ASUSTeK and ASUS Computer International was originally filed in the Central District of California and transferred to the Northern District of California. The dispute is tied to U.S. 6,430,498 via ASUS's IPR and the overlapping Maxell-ASUS docket record, and the parties reportedly settled in March 2019.
Maxell, Ltd. sued BlackBerry Corporation and BlackBerry Ltd. in D. Del., listing U.S. Patent No. 6,580,999 among a multi-patent assertion. Maxell stipulated to dismissal of Count 1 in August 2018, and the case proceeded on remaining counts until it was ultimately resolved by the parties.
Maxell asserted U.S. Patent 7,995,897 against BlackBerry. The '897 count (Count 1) was dismissed by Maxell's stipulation docketed Aug. 24, 2018, and the case continued on other patents.
Maxell asserted U.S. Patent 7,995,897 against BLU Products. Olympus's May 18, 2018 IPR petition confirmed the '897 patent was asserted in this D. Del. action; final disposition was not verified.
Maxell, Ltd. sued BLU Products, Inc. for willful patent infringement under 35 U.S.C. § 271 in the District of Delaware. The case is closed.
Maxell, Ltd. (then Hitachi Maxell, Ltd.) sued Huawei Device USA Inc. and Huawei Device Co., Ltd. in the Eastern District of Texas, asserting U.S. 6,928,292; claims 1 and 2 were construed. The case closed on July 2, 2018, resolved via settlement/license.
Maxell, Ltd. sued ZTE Corporation and ZTE USA Inc. in the Eastern District of Texas, asserting U.S. 6,928,292. The case was coordinated with the Huawei case and closed in 2018.
Maxell sued ZTE in the Eastern District of Texas. The narrative lists this among the 2016 '760 litigation history, while noting the asserted-patent link to U.S. Patent 6,856,760 is unverified.
Maxell asserted eight patents, including U.S. Patent No. 8,098,695, against ZTE; the '695 patent was asserted against ZTE USA only. A jury found ZTE willfully infringed seven patents, including the '695 patent, and awarded $43.3 million; the case was terminated on March 11, 2019, under a confidential settlement.
Maxell, Ltd. filed this infringement suit against Lenovo Group Ltd., Lenovo (United States) Inc., and Motorola Mobility LLC, alleging infringement on eight patents. A motion for alternative service was granted on February 15, 2022.
Maxell asserted the '394 patent against Lenovo and Motorola Mobility in the Western District of Texas. The action is stayed pending final determination of ITC Inv. No. 337-TA-1312.
The '491 patent's litigation record lists this W.D. Tex. case as part of its litigation history. The defendant, exact filing date, and outcome could not be confirmed.
Earlier Eastern District of Texas case in which Maxell asserted U.S. Patent 7,116,438 among other patents against Huawei. Maxell's Notice of Readiness stated this and other earlier E.D. Tex. cases were dismissed and closed; the '438 claim terms were construed in the Huawei action.
Earlier E.D. Tex. action listed in the patent family/litigation record. Per RPX, six patents including U.S. Patent No. 6,928,306 were previously asserted in this District against the Huawei/ZTE/ASUS group; the exact defendant mapping between -00033 and -00034 was not confirmed. A 2018 opinion, Maxell Ltd. v. Huawei Device U.S. Inc., 297 F. Supp. 3d 668, reflects claim-construction activity.
Section 337 investigation brought by Maxell against Samsung entities; the '971 patent is expressly recited in Maxell's Section 337 complaint. The institution date and current status were not independently confirmed in the narrative.
Maxell asserted seven patents, including US 11,223,757, against Samsung. The court granted summary judgment of non-infringement on the '757 and '590 patents pre-trial; after a jury verdict on other patents, the district court granted Samsung JMOL, and Maxell appealed and sought a stay pending related PTAB proceedings.
Maxell asserted U.S. Patent 7,203,517 and U.S. Patent 8,982,086 in the Eastern District of Texas against Huawei Device Co., Ltd. and Huawei Device USA, Inc., among other defendants in the family of suits. The case was resolved and dismissed as part of Maxell's settlements.