ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,459,660, issued on Nov. 4, was assigned to Rolls-Royce Corp. (Indianapolis).

"Limited slip torque-limiter coupling" was invented by Andrew D. Copeland (Indianapolis).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aircraft includes a first propulsion unit, a second propulsion, and a controller configured to increase thrust output in one of the first propulsion unit or the second propulsion unit in response to a detected thrust reduction from the other of the first propulsion unit. Each of the first propulsion unit and the second propulsion unit include a rotor driven by a gas turbine engine with a drive shaft, an output shaft coupled between the drive s...