4. Boring or penetrating the earth
  5. With signaling, indicating, testing or measuring

Sven O. Havig

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Method and apparatus for installing electronic equipment below s

Communications – electrical: acoustic wave systems and devices – Signal transducers – Receivers
Patent

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Method and apparatus for installing electronic equipment below s

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Method and apparatus for installing electronic equipment...

Boring or penetrating the earth – With signaling – indicating – testing or measuring
Reexamination Certificate

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Method for installing electronic equipment below soft earth surf

Boring or penetrating the earth – With signaling – indicating – testing or measuring
Patent

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Method of monitoring a mineral reservoir

Wells – Processes – With indicating – testing – measuring or locating
Patent

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Profile ID: LFUS-PAI-P-1335029

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