ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,830, issued on May 26, was assigned to Yamaha Robotics Co. Ltd. (Tokyo).

"Position control apparatus, position control method, position control recording medium, and bonding apparatus" was invented by Kohei Seyama (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A position control apparatus includes: a tool unit performing a work on a target object placed on a stage; a first imaging unit imaging a reference indicator set on the stage or the target object and outputting a first image; a second imaging unit imaging the reference indicator and outputting a second image; a head unit supporting the tool unit, the first imaging unit, and the second im...