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

John E. Mercer

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An above-ground arrangement for and method of locating a discret

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location
Patent

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Apparatus for distinguishing false signals in cable locating

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location
Reexamination Certificate

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Arrangement for reading from and/or writing to flexible...

Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate

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Arrangement for reading from and/or writing to flexible...

Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate

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Arrangement for reading from and/or writing to flexible...

Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate

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Profile ID: LFUS-PAI-P-239464

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