ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,307, issued on Jan. 27, was assigned to FRANKLIN ARMORY HOLDINGS INC. (Minden, Nev.).
"Firearm barrel" was invented by Ryan Paul Fellows (Hollister, Calif.) and Jay Leonard Jacobson (Minden, Nev.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A firearm barrel has an elongated body defining a bore and defining a bore axis, the body defining a breech end and an opposed muzzle end, a chamber defined in the breech end and contiguous with the bore; the bore having an interior surface having a plurality of alternating lands and grooves, the grooves being surfaces separated from the bore axis by first radius, the lands being surfaces separated from the bor...