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Current impulse method and apparatus for testing geophone string

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

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Determination of sensor distance

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

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Determination of system response

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

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Device for determining the configuration and calibrating long, t

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

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Difar demultiplexer test circuit

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

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Digital signal demodulator calibration system and method for...

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

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Directional line-hydrophone array calibrator

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

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Directivity display device and method

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

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Doppler log

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

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Dual slope compensation apparatus

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

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Echo simulator for active sonar

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

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Electric test set for acoustic torpedo homing systems

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

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Fiber-optic seismic array telemetry, system, and method

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

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Frequency-modulated monitor hydrophone system

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

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Geophone checker

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

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Geophone normalization process

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

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Geophone testing apparatus

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

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Hydrophone acoustic response chamber

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

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Hydrophone array polarity test circuit

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

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Hydrophone checker

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

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