Aerial antennas, antenna masts, electric cables, electrical signal receivers, electrical signal generators, electrical signal transmitters, electrical signal modems, computer hardware, and computer software for assisting a global positioning system (GPS) in obstructed areas by artificially generating and transmitting GPS signals

'aerial':1 'antenna':2,3 'area':33 'artifici':35 'assist':25 'cabl':6 'comput':19,22 'electr':5,7,10,13,16 'generat':12,36 'global':27 'gps':30,39 'hardwar':20 'mast':4 'modem':18 'obstruct':32 'posit':28 'receiv':9 'signal':8,11,14,17,40 'softwar':23 'system':29 'transmit':38 'transmitt':15

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