ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,208,486, issued on Jan. 28.
"Secure grinder blade and tapered tool-side locking hub for flush cutting concrete" was invented by Daniel Nelson (Morgan, Utah) and Heather Smith Nelson (Morgan, Utah).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus may include a grinder blade for flush cutting concrete, the grinder blade comprising: a distal side that defines a flush cutting plane and a proximal side opposite the distal side, and a locking hub receiver section unitarily formed from the grinder blade at a center portion and extending from the grinder blade a proximal direction to receive a locking hub with a plurality of fasteners disposed proxima...