ALEXANDRIA, Va., Aug. 18 -- United States Patent no. 12,709,307, issued on Aug. 18, was assigned to Advanced Rail Energy Storage Inc. (Westlake Village, Calif.).
"Gravitational potential energy storage systems and methods" was invented by Howard Trott (Kirkland, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A gravitational energy storage system is provided that includes one or more tracks extending from a lower storage yard to an upper storage yard, a plurality of mass cars moveable along the track, a conveyance system comprising at least a first tether, and a first power module associated with the first tether to drive a respective one of the first tethers to move the plurality of mass cars from the ...