ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,111, issued on July 8.

"Drilling jig assembly" was invented by Robert Schaffer (Huron, S.D.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A drilling jig assembly includes a hub unit that has a receiver and a plurality of spokes and the receiver engages a kelly bar of a drilling rig. A plurality of bolt jigs is each coupled to a respective one of the spokes on the hub unit to receiving a respective one of a plurality of bolts of a bolt cage. A plurality of yoke supports is each slidably disposed on a respective one of the spokes of the hub unit such that each of the yoke supports is spaceable an adjustable distance from the receiver of the hub unit. ...