ALEXANDRIA, Va., March 3 -- United States Patent no. 12,564,866, issued on March 3, was assigned to Laitram LLC (Harahana, La.).

"Stacked-package detection system" was invented by Matthew L. Fourney (Laurel, Md.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A stacked-package detection system for a matrix sorter detects stacked packages by comparing weight or dimension measurements on primary sorters from those measurements on secondary sorters. Weight or dimension increases for a package on a secondary sorter indicate a stack of packages. A recirculation system diverts packages identified on the secondary sorters as stacked packages back into bulk flow to be reprocessed by the primary or secondary sorters."...