4. Boring or penetrating the earth
  5. Automatic control
  6. Of boring means including a below-ground drive prime mover

Robert L. Alder

Inventor

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Automatic drilling process and apparatus

Boring or penetrating the earth – Automatic control – Of boring means including a below-ground drive prime mover
Patent

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In-hole motor tachometer

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Valve with circulation timer

Fluid handling – With indicator – register – recorder – alarm or inspection means – Time
Patent

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Profile ID: LFUS-PAI-P-803036

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