4. Boring or penetrating the earth
  5. Tool actuation by reaction of rotating eccentric mass
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Vibrator-assisted well and mineral exploratory drilling, and dri

Boring or penetrating the earth – Tool actuation by reaction of rotating eccentric mass
Patent

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Vibratory drill head apparatus

Boring or penetrating the earth – Tool actuation by reaction of rotating eccentric mass
Patent

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Vibratory earth penetrator with synchronized air lance control

Boring or penetrating the earth – Tool actuation by reaction of rotating eccentric mass
Patent

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Vibratory unit for drilling systems

Boring or penetrating the earth – Tool actuation by reaction of rotating eccentric mass
Reexamination Certificate

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