ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,057, issued on Sept. 23, was assigned to Kyoto Seisakusho Co. Ltd. (Kyoto, Japan).

"Linear conveying device and control method thereof" was invented by Atsushi Tanaka (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a linear conveying device for conveying articles with a linear motor, of a plurality of shuttles, at least two are combined together to form a first operating group. In the first operating group, one of the shuttles in it is taken as a first master shuttle, and any other is taken as a first slave shuttle. The first master shuttle is controlled based on its position on the guide portion. The first slave shuttle is controll...