4. Communications, electrical: acoustic wave systems and devices
  5. Testing, monitoring, or calibrating

Eugene D. Bednar

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Accelerometer transducer used for seismic recording

Acoustics – Geophysical or subsurface exploration – Well logging
Reexamination Certificate

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Geophone checker

Communications – electrical: acoustic wave systems and devices – Testing – monitoring – or calibrating
Patent

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Hydrophone assembly

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate

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Hydrophone checker

Communications – electrical: acoustic wave systems and devices – Testing – monitoring – or calibrating
Patent

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Profile ID: LFUS-PAI-P-1686556

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