ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,438, issued on Nov. 11, was assigned to Archer Aviation Inc. (San Jose, Calif.).

"Hub feed oil system" was invented by William Martin Waide (Central Point, Ore.).

According to the abstract* released by the U.S. Patent & Trademark Office: "One embodiment of a hub feed oil system is used to provide oil to components on the rotating side of an aircraft rotor hub system. A pump is configured so that a portion of the pump rotates with the rotating portion of the rotor system and a portion of the pump is fixed relative to the static portion of the rotor system. Multiple oil channels-with the provision of a variety of different pressures-may be provided."

The patent was filed on July 2...