ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,115, issued on Sept. 16, was assigned to Wilson Sporting Goods Co. (Chicago).

"Racquet configured with increased flexibility in multiple directions with respect to a longitudinal axis" was invented by William D. Severa (Lombard, Ill.), Dale J. Zwack (Bartlett, Ill.), Robert T. Kapheim (Downers Grove, Ill.) and Eloisa M. Compostizo (Bilbao, Spain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A racquet extending along a longitudinal axis and including a frame including a head portion, a handle portion, and a throat portion. The head portion forms a hoop that defines a string bed plane. At least the head portion and the throat portion of the frame ar...