US ITC rules on Infineon/Innoscience patent case
The Full Commission of the US International Trade Commission (ITC) has affirmed the ITC's ruling from December 2025 that Innoscience infringed an Infineon patent (US Patent No. 9,899,481) covering a lateral GaN transistor device featuring a package with source-sensing functionality.
The ITC has confirmed the patent's validity and ruled that Innoscience infringed it, leading to import and sales bans on the infringingconcerning GaN technology and ordered import and sales bans against Innoscience. The decision and the bans are subject to a 60-day review period of the US President.
“This decision once again highlights the robustness of Infineon’s intellectual property. It reinforces our commitment to actively protect Infineon’s patent portfolio and uphold fair competition in the industry,” said Johannes Schoiswohl, SVP and head of GaN Systems business line at Infineon. “With our industry-leading 300-mm GaN manufacturing, we are uniquely positioned to scale innovation and deliver the performance, quality, and cost advantages that our customers need to accelerate decarbonisation and digitalisation,” he continues.
In a parallel dispute in Germany, Infineon is asserting infringement of three patents and one utility model in the Munich District Court. In August 2025, the Munich court found infringement of the first Infineon patent by Innoscience. Trials for another patent and a utility model are scheduled in June 2026.
Meanwhile, Innoscience has pointed out that this latest ruling also affirmed the Judge’s finding of no violation of US Patent No. 9,070,755 and confirmed that Innoscience’s redesigned products — now embodied in its current commercial offerings — fall outside the scope of US Patent No. 9,899,481. The Commission also invalidated four additional claims of the ’481 patent.
Innocience adds that only two claims of the ’481 patent were found valid and infringed, and only with respect to legacy products that are no longer manufactured or sold. As a result, the associated import ban has no practical impact on Innoscience’s U.S. business. Innoscience will continue supplying its existing GaN power products to US and worldwide customers uninterrupted.
Innoscience has asked the US Patent and Trademark Office to initiate review of the remaining two claims and is confident they will likewise be invalidated.
The disputes look likely to continue.
