74602829
Nov 25, 1994
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
Electrical and Scientific Apparatus