ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,634, issued on Sept. 30, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).

"Gas spring-powered fastener driver" was invented by David Bierdeman (New Berlin, Wis.), Andrew R. Wyler (Pewaukee, Wis.), Nicholas A. Albers (Portland, Ore.) and Mitchell Ellena (Brookfield, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gas spring-powered fastener driver includes a cylinder, a moveable piston positioned within the cylinder, and a driver blade attached to the piston and movable therewith between a top-dead-center (TDC) position and a driven or bottom-dead-center (BDC) position. The driver blade defines a driving axis. The driver blade...