ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,409, issued on July 29.

"Alternate reality system for a ball sport" was invented by Lenny Schloss (Charleston, S.C.), Lee Wheelbarger (Fulks Run, Va.) and Robert Cantrell (Herndon, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An alternate reality training system for tennis is operationally coupled to a head assembly, a stand assembly, and a vertical polymer flexible rod assembly connecting the substantially polymer head assembly to the stand assembly. The vertical polymer flexible rod assembly oscillates when a ball member held in the head assembly is hit by a racket. An alternate reality software system is adapted to synchronize with oscillat...