ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,550,814, issued on Feb. 17, was assigned to HUSQVARNA AB (Huskvarna, Sweden).

"Robotic working tool system and method" was invented by Daniel Wikestad (Hestra, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a robotic working tool system comprising a robotic working tool (1), and a navigation arrangement enabling the robotic working tool to navigate within a working area (3) defined by a working area boundary (13). A recording unit (62) is used to establish at least first and second sub-areas (21-47), defined by closed perimeters. A mapping unit (60) is used to provide the working area to the robotic working tool ...