ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,344, issued on March 18, was assigned to Cosmo Seiki Co. Ltd. (Ehime, Japan).
"Dart" was invented by Hiroaki Matsubara (Matsuyama, Japan) and Masayuki Matsubara (Toon, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dart may comprise-in order from the front thereof-a point, a barrel, a shaft, and a flight. The flight may comprise a plurality of fins. The fins may comprise mesh-like reinforcing ribs that protrude from surfaces thereof. The fins may further comprise, at peripheries thereof, fin rims formed so as to be of increased thickness. Reinforcing ribs may be formed over the approximate entireties of the fins. The shaft may comprise an i...