ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,455,388, issued on Oct. 28, was assigned to Metrotech Corp. (Santa Clara, Calif.).

"Underground line locator system with real time kinematic and global satellite positioning" was invented by Andrzej Zbigniew Regini (Santa Clara, Calif.), William Moore (Santa Clara, Calif.) and Stephen John Petherick (Santa Clara, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A precise line locator is presented that provides precise line location. The locator includes a housing; a wand attached to the housing, the wand including an array of low frequency antennas arranged along the wand, the array of low frequency antennas defining an electromagnetic locate axis ...