ALEXANDRIA, Va., July 14 -- United States Patent no. 12,681,478, issued on July 14, was assigned to Turf Tank ApS (Svenstrup J, Denmark).

"Method for marking a ground surface using a robot unit and a local base station, the system therefore and use thereof" was invented by Anders Ulrik Sorensen (Hjorring, Denmark) and Andreas Ydesen (Hjorring, Denmark).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a method for marking a ground surface according to a predefined marking pattern using a system including a robot unit and a local base station including acts of providing two flag points, receiving global positioning data of the robot unit using a robot GNSS receiver, receiving global positioning data o...