U.S. federal trademark · Serial No. 97832972 · Reg. No. 2304121
Laser sensor devices to measure distance within a tunnel; Laser sensors for measuring positions and distances with wireless connectivity for remote, real time, continuous and unmanned monitoring; Wireless convergence sensors for measuring positions and distances; Laser sensors to measure distance; Battery powered sensors for remote monitoring of convergence and divergence of a tunnel, namely, sensors for measuring positions and distance; all of the foregoing for use in mining, construction, rock processing, tunnelling and rock excavation and not used for the purposes of security or as an alarm
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