ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,465,021, issued on Nov. 11, was assigned to ROLLING RODENTS LLC (Roslyn, N.Y.).

"Ring-shaped housing for rodent exercise ball" was invented by Adam Haber (Roslyn, N.J.), Ethan Haber (Winston-Salem, N.C.), William Fiebel (Succasunna, N.J.), Mark Dorsey (Darien, Conn.), Joohwi Rhi (Oradell, N.J.), Mathieu Zastawny (Jersey City, N.J.) and Maya Kremien (Austin, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rodent exercise system includes a rodent exercise ball having a cavity with an inner surface and an access door on an outer surface that is selectively openable for entry of a rodent. A ring-shaped housing defines a central aperture aligned along...