May 23, 2011
A Virginia federal judge ruled Friday that United Technologies Corp.'s jet engines do not infringe Rolls-Royce PLC's patent, finding the patent disclosed a fan blade that has only three sweep regions to UTC's four.
May 06, 2010
The U.S. Court of Appeals for the Federal Circuit has upheld a finding that Rolls-Royce PLC’s patent for a widely used jet engine is not obvious in light of a United Technologies Corp. patent application, spurring Rolls-Royce to launch an infringement action against its aerospace rival.