ALEXANDRIA, Va., June 12 -- United States Patent no. 12,296,395, issued on May 13, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).
"Drill bit" was invented by Brett A. Parendo (Milwaukee), Alexander R. Greenhill (Wauwatosa, Wis.), David Hlavac (Germantown, Wis.) and Carter A. Gibson (Port Washington, Wis.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of manufacturing a drill bit includes providing a piece of bar stock having a first end, a second end opposite the first end, and an axis of rotation extending centrally through the bar stock between the first and second ends, cutting the first end of the bar stock to form a first tip angle at an oblique angle measured through the axi...