ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,361, issued on Sept. 9.

"Low-profile balance board" was invented by Richard Yates Watson (Park Ridge, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A balance board comprising a board, a first member, and a pivot interface. The board has a top side for applying active use resistance and active use effort, a bottom side, and an outer circumference. The first member consists of a base, a first side, a second side, and a pivot, the base having a width and the pivot having a second width, the first width greater than the second width. The first pivot interface comprises a roll section of the pivot and a first section of the bottom side of the boar...