ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,212, issued on June 2, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).

"Drive assembly for a power tool" was invented by Jacob P. Schneider (Cedarburg, Wis.), Braden A. Roberts (Brookfield, Wis.), Troy C. Thorson (Cedarburg, Wis.) and Evan Brown (Milwaukee).

According to the abstract* released by the U.S. Patent & Trademark Office: "An anvil configured to be impacted by a hammer in an impact wrench. The anvil defines a rotational axis. The anvil includes an anvil lug having a driven surface engageable with the hammer. The driven surface includes an involute profile. The involute profile is formed by a base cylinder defining a central axis. The central axis is off...