ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,479,075, issued on Nov. 25, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).
"Powered fastener driver" was invented by Ian Spayer (Berwyn, Ill.) and Jonathan E. Abbott (Milwaukee).
According to the abstract* released by the U.S. Patent & Trademark Office: "A powered fastener driver includes a cylinder containing a pressurized gas, a piston within the cylinder and moveable from a top-dead-center position to a bottom-dead-center position, a driver blade moveably coupled to the piston for driving a fastener into a workpiece, and a lifter mechanism for providing torque to move the driver blade from the bottom-dead-center position toward the top-dead-center position. The ...