U.S. federal trademark · Serial No. 75885639 · Reg. No. 2598675
ELECTRONIC SYSTEM FOR LOCATING AND MONITORING DRILL HEADS DURING HORIZONTAL DIRECTIONAL SUBSURFACE DRILLING OPERATIONS COMPRISED OF A RECEIVER; ELECTRONIC SYSTEM FOR LOCATING AND MONITORING DRILL HEADS DURING HORIZONTAL DIRECTIONAL SUBSURFACE DRILLING OPERATIONS COMPRISED OF A GRAPHIC DISPLAY
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