orientation and navigational devices for tunneling under roads, highways, railways or rivers, laying underground cables or pipes, or inspection of pipe systems; namely, comprising a data probe, an interface box and a handheld control terminal, and computer software for use in operating said devices

'box':30 'cabl':15 'compris':24 'comput':37 'control':34 'data':26 'devic':4,44 'handheld':33 'highway':9 'inspect':19 'interfac':29 'lay':13 'name':23 'navig':3 'oper':42 'orient':1 'pipe':17,21 'probe':27 'railway':10 'river':12 'road':8 'said':43 'softwar':38 'system':22 'termin':35 'tunnel':6 'underground':14 'use':40

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