Patent suits left an indelible mark in the LED industry in 2016, Seoul Semiconductor took the lead this week warning 29 companies over potential patent infringement issues. Nichia also announced it had won two legal YAG patent suits against Everlight in Dusseldorf District Court in Germany and the local appeal court. Cree also has settled a long pending patent infringement case with Feit Electric for an undisclosed amount, and the two companies have signed a patent license agreement.

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.