ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,719,331, issued on Aug. 25, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).

"Battery-powered stand-alone motor unit" was invented by Connor P. Sprague (Milwaukee), Evan M. Glanzer (Milwaukee) and John E. Koller (Waukesha, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of assembling a stand-alone motor unit and a piece of power equipment includes moving the motor unit in a first direction onto the piece of power equipment, such that a protrusion of the piece of power equipment is received in a slot of the motor unit. The method further comprises moving the motor unit along the piece of power equipment in a second direction...