ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,072, issued on April 15, was assigned to NEW TECH CUTTING TOOLS INC. (Kent, Wash.).

"Rotary cutter for machining materials" was invented by Steven M. Swift (Kent, Wash.) and Luke Tyler Swift (Kent, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Novel endmills are provided. Such endmills have a body with outside diameter (OD), and outer surface, and a longitudinal axis, a plurality of flutes, helical in some embodiments. Flutes include a narrow leading edge land portion with circular segment profile and having flute cutting edge portions along a substantially uniform circumferential location, with an eccentric relief margin rotationally rearward...