MediaTek Wireless, Inc. is a Massachusetts-incorporated U.S. subsidiary of MediaTek Inc. (TWSE: 2454), the Taiwan-based fabless semiconductor designer. It is headquartered in Woburn, Massachusetts, and functions as MediaTek's U.S. wireless operation. It traces to MediaTek's acquisition of Analog Devices' cellular handset radio and baseband chipset business — the Othello radio and SoftFone baseband product lines — for roughly US$350 million, closing in January 2008; MediaTek opened its U.S. wireless headquarters in Woburn in October 2008 using the acquired staff (Boston Business Journal; MediaTek press release; ADI Form 8-K).
Parent MediaTek Inc. was founded in 1997, is listed on the Taiwan Stock Exchange under code 2454, and is headquartered in Hsinchu, Taiwan. It is a public company with no controlling parent. Public sources put headcount in the roughly 17,000–22,000 range and trailing-twelve-month revenue near US$19 billion (PitchBook; MarketScreener; GlobalData). MediaTek designs (does not fabricate) SoCs for smartphones and tablets (Dimensity and Helio lines), 5G/4G modems and broadband (GPON/xDSL, 5G FWA), Wi-Fi/Bluetooth/GNSS connectivity, smart TV and smart-home chips, automotive platforms, AIoT, and ASIC/custom-silicon services.
Litigation posture: MediaTek Wireless is an operating-company affiliate, not a patent assertion entity. In the tracked data it appears as a defendant in one case and as plaintiff in none, consistent with a chip supplier drawn into patent disputes rather than a licensor asserting patents. The single tracked matter is a U.S. International Trade Commission §337 investigation — the ITC, not a district court such as the Eastern District of Texas.
Notable case: LSI Corporation et al. v. Funai Electric Co., Ltd. et al. (filed March 12, 2012; Inv. No. 337-TA-837, "Certain Audiovisual Components and Products Containing the Same"). Complainants LSI and Agere named MediaTek Inc., MediaTek USA Inc., and MediaTek Wireless, Inc. (Woburn, MA) as respondents alongside Funai, Ralink, and Realtek, asserting Wi-Fi and multimedia-processing patents in digital TVs, Blu-ray/DVD players, and related devices. LSI later withdrew all allegations against the MediaTek and Ralink respondents, and the ALJ terminated the investigation as to them in early 2013 (USITC; Federal Register).