Plaintiff
3 cases as plaintiff.
I'll research this company before writing the profile.
Let me verify the ownership history and litigation posture.
Let me confirm current size and ownership figures.
Maxell, Ltd. (formerly Hitachi Maxell, Ltd.)
Maxell, Ltd. is a Japanese electronics manufacturer headquartered in Tokyo, with its registered head office in Ibaraki, Osaka. The company was established in September 1960 (with a registered incorporation date of 1947 following an earlier merger) and was named Hitachi Maxell, Ltd. from 1964 until it became Maxell Holdings, Ltd. in 2017, then Maxell, Ltd. in 2021. It is publicly traded on the Tokyo Stock Exchange Prime Market under ticker 6810; Hitachi, Ltd. made it a wholly owned subsidiary in 2010, but it was relisted in 2014 and Hitachi has since reduced its stake to a small minority holding. Employee count is roughly 3,800–4,100 and net sales were approximately ¥129.8 billion in FY2025, per company and financial-data sources.
Maxell manufactures batteries, materials, optical components and appliances across four reporting segments: Energy (lithium-ion, coin-type lithium, primary and solid-state batteries, electrodes, chargers); Functional Materials (adhesive and semiconductor-process tapes, coated separators, industrial rubber products); Optics & Systems (automotive camera and LED headlamp lenses, semiconductor embedded systems, electroformed parts, molds, RFID/IC cards); and Life Solutions (Izumi-brand shavers and beauty/health appliances, projectors, small electrical equipment).
The tracked case data show Maxell only as a plaintiff (2 cases, 0 as defendant), consistent with an operating company that actively asserts its own patent portfolio rather than a non-practicing entity. Both suits were filed on November 18, 2016 in the plaintiff-friendly U.S. District Court for the Eastern District of Texas, Texarkana Division.
The two tracked matters are Hitachi Maxell, Ltd. v. Huawei Device USA, Inc. (5:16-cv-00178) and Hitachi Maxell, Ltd. v. ZTE Corp. et al. (5:16-cv-00179), asserted on 15 patents covering 3G/4G cellular and mobile-device technologies; the cases were consolidated for pretrial purposes. Defendants challenged the patents via inter partes review at the PTAB. A jury reportedly returned a verdict for Maxell against ZTE USA on seven patents with $43.3 million in damages.
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Complaint asserted eight U.S. patents, including U.S. 8,736,729 and U.S. 8,339,493. In or about July 2018 a jury found ZTE liable for willful infringement and awarded Maxell approximately $43.3 million; the narrative notes it could not confirm whether the trial verdict specifically rested on the '729 patent.
Patent infringement action by Hitachi Maxell against Huawei and Huawei Device entities. The case was stayed pending PTAB inter partes review and docket records show it closed on July 2, 2018.
Hitachi Maxell asserted U.S. Patent 6,856,760 against Huawei Device USA in the Eastern District of Texas. The narrative identifies the '760 patent as one of the asserted patents, but the case outcome is not confirmed.