ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,779, issued on Nov. 11.
"Magnetized weight and distance measuring assembly and method" was invented by John Walter (Chariton, Iowa).
According to the abstract* released by the U.S. Patent & Trademark Office: "A magnetized weight and distance measuring assembly and method for demonstrating the inverse square law of magnetism by displaying a change in distance between magnets after applying a weighted member to one of the magnets includes a base and a base magnet mounted the base. A shaft is coupled to the base, and a shaft magnet is mounted to the shaft and is moveable along the shaft when the shaft magnet repels away from the base magnet by a magnetic force. A tube is attached to...