ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,234, issued on April 29, was assigned to ARCHER AVIATION INC. (San Jose, Calif.).

"Aircraft electric propulsion system with overlapping shafts for gearbox oil distribution" was invented by Scott Graves (Felton, Calif.) and Alan D. Tepe (Fremont, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electric propulsion system for a vertical take-off and landing (VTOL) aircraft having a heat exchanger to cool fluids used in an electrical engine, the electric propulsion system comprising at least one electrical engine mechanically connected directly or indirectly to a fuselage of the VTOL aircraft and electrically connected to an electrical power sou...