ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,912, issued on Sept. 30, was assigned to PLG Technologies Inc. (Bakersfield, Calif.).

"Steering head for pipe ramming/hammer boring installations" was invented by Aaron Orndorff (Bakersfield, Calif.) and Brian Sherrell (Bakersfield, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A steering head for a pipe ramming hammer bore construction system, configured to allows passage of soil through the center of the steering head while maintaining the ability to change the bore alignment through the use of inflatable bags which are underlying and adjacent to a portion of a shell member which extends radially outward from the steering head upon inflat...