ALEXANDRIA, Va., March 3 -- United States Patent no. 12,564,918, issued on March 3, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).
"Tool bit" was invented by Roger D. Neitzell (Palmyra, Wis.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tool bit includes a hexagonal drive portion, a working end, and a shank. The working end is made of a first material and a has a first hardness. The shank connects the drive portion to the working end. The shank defines a longitudinal axis about which the tool bit is rotatable. The shank is made of a second material having a second, different hardness. The shank includes a protrusion and an annular shoulder. The shank extends within a portion of the work...