ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,602, issued on Feb. 24, was assigned to Matthew Rossi (Westport, Conn.).

"Golf training device for optimal putting speed from various distances and slopes" was invented by Matthew Rossi (Fairfield, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A golf putting device with guide rails, semi-circle placed into the real putting green cup and a round cup target with a flag that slides into varying positions of inches from behind the real cup ranging from 1 inch to 18 inches. A golf ball must have sufficient velocity to make it the target cup behind the real putting green cup in order for the ball to make it into the real cup. By attempting to putt ...