ZMD America, Inc. was the U.S. subsidiary of Zentrum Mikroelektronik Dresden AG (ZMD AG, later branded ZMDI), a German fabless semiconductor maker headquartered in Dresden. ZMD's roots trace to 1961 as part of the GDR's VEB Kombinat Robotron; the current company was re-formed as ZMD GmbH in 1993 and became an AG in 2001. ZMD AG held 100% of ZMD America since 1996. The subsidiary was incorporated in California, with a principal U.S. office in Melville, New York (earlier Santa Clara and Milpitas, CA). On December 7, 2015, Integrated Device Technology, Inc. (IDT) acquired ZMDI for roughly $307–310 million in cash, folding it into IDT's Automotive & Industrial business.
Products / operations. ZMD America was an operating sales, marketing, and design-support arm for ZMDI's analog and mixed-signal portfolio — not a shell. Its product lines included sensor signal-conditioning ICs (e.g., ZMD31015), the MUSic multi-sensor interface family, TSic high-precision temperature sensor ICs, SARah low-power SAR ADCs, and digital power-management devices, plus ASICs/ASSPs for automotive, industrial, medical, and consumer applications. ZMDI's group revenue was about €61 million (2014) with roughly 320 employees; ZMD America itself was a small operation (a modest positive result of about €0.1 million in 2012).
Patent-litigation posture. ZMD America appears once in the tracked data, as a defendant (0 plaintiff cases, 1 defendant case) — the classic profile of an operating company defending against an NPE suit, not an asserter. It has no role as a plaintiff.
Notable case. Azure Networks LLC et al. v. Texas Instruments Incorporated et al., No. 6:10-cv-00681 (E.D. Tex., Tyler Division), filed December 22, 2010. Plaintiffs Azure Networks LLC and Tri-County Excelsior Foundation — NPE-style entities associated with the same patent-enforcement group — asserted U.S. Patent No. 7,020,501 ("Energy Efficient Forwarding in Ad-Hoc Wireless Networks") against ZMD America and co-defendants including Texas Instruments, Freescale, Atmel, NXP, and Microchip Technology. The case was filed in the plaintiff-favorable Eastern District of Texas. ZMD AG's 2011 annual report states the Texas patent action was resolved amicably without further cost.