Sony filed the complaints on December 28 with the U.S International Trade Commission in Washington and federal court in Los Angeles, with the former having the power to block imports of products that have been found to violate U.S patents. According to Sony, LG phones including the Lotus Elite, Neon, Lotus Elite, Rumor 2 and Xenon are using patented technology without permission.
LG has said that it will assess the claims, taking action once it has reviewed the technologies in question.
It comes at a bad time for LG, the company is trying to reverse its fortunes in the smartphone market after posting third-quarter net profit that was down 99% year-on-year. It will be looking to release the world’s first dual-core smartphone, the LG Optimus 2X, in January, the last thing the company needs is to see US shipments of its handsets blocked.