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Acoustic device

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

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Acoustic devices

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

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Acoustic digitizing system

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – By combining or comparing signals
Patent

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Acoustic dipole shear wave logging device

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent

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Acoustic direction finder

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With beam steering – scanning – or focussing
Patent

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Acoustic direction finding systems

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With plurality of transducers
Patent

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Acoustic distance measuring apparatus and method of use

Communications – electrical: acoustic wave systems and devices – Transponders – With plurality of transponders
Patent

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Acoustic distance measuring method and apparatus

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With electromagnetic wave
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Acoustic doppler channel flow measurement system

Communications – electrical: acoustic wave systems and devices – Echo systems – Speed determination
Reexamination Certificate

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Acoustic Doppler detector

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Patent

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Acoustic doppler dual current profiler system and method

Communications – electrical: acoustic wave systems and devices – Echo systems – Speed determination
Reexamination Certificate

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Acoustic element tester for an array of hydrophones

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

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Acoustic emission source location by reverse ray tracing

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With plurality of transducers
Patent

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Acoustic emission source location on plate-like structures using

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With time interval measuring means
Patent

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Acoustic emission system for seismic surveying at sea

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent

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Acoustic emitters for use in marine seismic surveying

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Reexamination Certificate

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Acoustic energy absorbing material

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

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Acoustic energy source

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

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Acoustic energy transmitter for borehole logging

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent

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Acoustic envelope having minimal vibration and flow induced nois

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
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