Company overview. Toshiba Corporation (株式会社東芝, "Toshiba") is a Japanese electrical and electronics manufacturer headquartered in the Shibaura district of Minato, Tokyo. Its roots trace to 1875; the present company was formed by the 1939 merger of Shibaura Seisakusho and Tokyo Denki and took the Toshiba name in 1978. It was listed on the Tokyo Stock Exchange from 1949 until December 20, 2023, when it was taken private in a roughly ¥2 trillion (~$13–15bn) tender offer by a consortium led by private-equity firm Japan Industrial Partners (JIP), alongside Orix, Chubu Electric Power and Rohm. It is now wholly owned by JIP vehicle TBJH and is no longer publicly traded. Toshiba has reported about 106,000 employees, with FY2025 (ended March 2026) revenue near ¥3.7 trillion and an 8.1% operating margin.
Products / services. Toshiba is an operating conglomerate, not an NPE. Its segments are Energy Solutions (nuclear, thermal, hydro and renewable generation; transmission and distribution equipment; hydrogen systems); Infrastructure Systems (water/wastewater, defense radar and guidance equipment, railway systems, elevators, lighting); Devices & Technology (power semiconductors, small-signal and optical devices, mixed-signal ICs, data-center hard disk drives, semiconductor manufacturing equipment, SCiB lithium-ion batteries); and Retail & Printing Solutions via Toshiba Tec (POS systems, multifunction printers). Its memory-chip business became Kioxia, and TV, PC, appliance and medical units were divested in the 2010s.
Patent-litigation posture. Both tracked appearances are as a defendant (2 of 2; zero as plaintiff) — the profile of an operating company being targeted rather than an asserter. Both sit in the plaintiff-friendly U.S. District Court for the Eastern District of Texas (Marshall Division), the "rocket docket."
Notable cases. The two tracked matters are parallel captions of Technology Properties Ltd. (TPL Group) et al. v. Fujitsu et al., filed October 2005 (2:05-cv-00494, E.D. Tex., Judge T. John Ward). TPL Group and Patriot Scientific pooled the Moore Microprocessor Patent portfolio (US 5,809,336; 5,784,584; 6,598,148), asserted via licensing arm Alliacense against Fujitsu, Matsushita/Panasonic, NEC and Toshiba entities over PCs, servers, TVs, handsets and automotive electronics. Toshiba settled in December 2007 and took an MMP license.