U.S. federal trademark · Serial No. 74602829
electronic land leveling, surveying, design and control systems, comprising transmitters and receivers capable of transmitting and receiving satellite signals, a data link capable of reading, calculating and sending the satellite signals to a control unit, and a programmable control unit which is capable of displaying, accepting, sorting and downloading the satellite survey data, and uploading design data for use in land leveling, surveying and designing
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