ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,287, issued on March 17, was assigned to HITACHI HIGH-TECH Corp. (Tokyo).

"Circular accelerator and particle beam treatment system" was invented by Futaro Ebina (Tokyo) and Kenji Miyata (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provide a circular accelerator and a particle beam therapy system that can improve the beam extraction efficiency. A circular accelerator that accelerates and extracts charged particle beams circulating in a magnetic field includes a first magnetic field region in which closed trajectories of the beams with different energies are eccentric and which has a magnetic field gradient decreasing in the magneti...