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BISMARCK, N.D. (AP) — A North Dakota city says it has regained its title of the center of North America.

Hanson’s Bar in Robinson snatched the title from the nearby city of Rugby last year because the city allowed its trademark to lapse.

Rugby officials say in a statement that the U.S. Patent and Trademark Office has returned the trademark to the city.

The debate over North America’s geographical center began almost 90 years ago when a respected federal mathematician stuck a pin in a cardboard map of the continent and recorded the coordinates of where it balanced on his finger.

Zealous leaders in Rugby saw the commercial potential and began promoting the town as the geographic center of North America, and in 1932 built a 21-foot-tall rock obelisk marking the supposed spot.