U.S. federal trademark · Serial No. 76690637 · Reg. No. 3665386
REDUNDANT DATA COMMUNICATIONS BACKBONE COMPRISED OF DIGITAL SIGNAL PROCESSORS, ELECTRONIC TRANSMITTERS AND RECEIVERS FOR USE WITH DIGITAL SIGNALS IN LARGE MINES, TUNNELS, AND OTHER SUBTERRANEAN AREAS, AND COMMUNICATIONS SOFTWARE FOR TRACKING AND CONTROLLING COMMUNICATIONS BETWEEN COMPUTERS AND UNDERGROUND WIRELESS COMMUNICATION SYSTEMS ACROSS LARGE MINES, TUNNELS, AND OTHER SUBTERRANEAN AREAS
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