Gallium nitride patent wars: Munich I Regional Court grants Infineon second injunction against Innoscience

Context: Gallium nitride (GaN) technology is used in an array of applications, such as renewable energy systems, data centers, industrial automation, and electric vehicles. In March 2024, Infineon Technologies sued China’s Innoscience Suzhou Technology Holding Co., Ltd. (Innoscience) over several GaN patents in the Northern District of California, before filing a parallel dispute in the Munich I Regional Court three months later. The patentee was granted an ex parte preliminary injunction (over U.S. Patent No. 9,899,481 (“electronic component and switch circuit”)) by the German court that same month (June 16, 2024 ip fray article). The company has also pursued parallel complaints in the United States International Trade Commission (ITC), although it has now withdrawn two of those four asserted patents (May 4, 2025 ip fray article). Meanwhile, Innoscience filed a countersuit over two of its Chinese GaN-related patents (CN117476762A and CN115663025A) in the Intermediate People’s Court of Suzhou City (January 20, 2025 Innoscience press release).

What’s new: In a major win for Infineon, the Munich I Regional Court has granted the patentee another injunction, finding that Innoscience infringed DE102014113465B4 (“Electronic component”) (August 1, 2025 Infineon press release).

Direct impact and wider ramifications: This is positive news for Infineon, whose enforcement campaign in the ITC has so far not gained much traction.

In a statement on Friday, Johannes Schoiswohl, Senior Vice President and Head of Infineon’s GaN Systems Business Line, said:

“The ruling is a testament to the strength of Infineon’s intellectual property and confirms Infineon’s commitment to vigorously defend its intellectual property against infringements.”