Companies manufacturing or packaging blue, green, white or UV LED devices made from semiconductor indium gallium nitride may be subject to patents owned by Seoul Semiconductor Co. Ltd., an LED manufacturer in South Korea. Included is US Patent No. 5,075,742, which was the subject of a recent ruling issued by the US District Court for the Eastern District of Texas. The ruling supports the company’s view that the patent is fundamental to indium gallium nitride-based LED technology. The patent and its family of patents in Japan, Germany, UK and France are available for licensing from the company to appropriate business partners.