ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,602, issued on April 21.
"Bat swing training aid" was invented by Jason Kline (Chaffee, N.Y.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A bat swing training aid is provided. The bat swing training aid includes a bat including a first longitudinal axis. The bat comprises a handle portion; a barrel portion having an outer wall defining a first cavity, wherein the barrel portion includes a first end and a second end, and wherein the second end provides access to the first cavity; a tapered portion disposed between and connecting the first end of the barrel portion and the handle portion; an end cap configured to be removably coupled with the secon...