ALEXANDRIA, Va., June 9 -- United States Patent no. 12,648,514, issued on June 9, was assigned to HUSQVARNA AB (Huskvarna, Sweden).

"Navigation for a robotic lawnmower system" was invented by Robert Blom (Jonkoping, Sweden) and Jonas Rangsjo (Vikingstad, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for use in a robotic lawnmower system comprising a robotic lawnmower arranged to operate in an operational area based on the satellite navigation sensor, determining that the robotic lawnmower is in a satellite shadowed area and in response thereto querying the map application for a reference object, and navigate to the reference object based on the deduced reckoning sensor, determining that the ...