ALEXANDRIA, Va., March 12 -- United States Patent no. 12,246,421, issued on March 11, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).
"Powered fastener driver" was invented by David A. Bierdeman (New Berlin, Wis.) and Marcus Wechselberger (Milwaukee).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fastener driver includes a housing, a cylinder supported by the housing, and a moveable piston positioned within the cylinder. A driver blade is attached to the piston and movable therewith between a top-dead-center position and a driven or bottom-dead-center position. The driver blade includes a body having a first side and an opposite, second side with the driving axis passing therebetween, a pl...