ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,379, issued on April 21, was assigned to Symbotic LLC (Wilmington, Mass.).

"Automatic storage and retrieval system having staging and sequencing buffer locations and segregated storage" was invented by David B. Simpson (Fort Mill, S.C.), William J. Fosnight (Windham, N.H.) and John G. Lert Jr. (Wakefield, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An order fulfillment system includes a storage structure for storing totes, workstations for processing customer orders and a staging and sequencing buffer having staging locations for storing the totes. The staging and sequencing buffer provides a buffer for totes as mobile robots transfer tote...