The finale of Aixtron’s sale to Grand Chip Investment ended with the Chinese investor dropping the deal after U.S. President Barack Obama prohibited the German equipment maker from transferring key U.S. patents and assets to the acquisitor, due to national security concerns. In brief, Aixtron’s equipment can be used to make GaN wafers that are used in U.S. military applications including Patriot missiles. The German equipment maker is currently considering to sell parts of its business off instead, after the deal with the Chinese investor failed.