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Systems and methods for flow measurement

Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Reexamination Certificate

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Systems and methods for locating subsurface objects

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

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Systems and methods for monitoring time-dependent subsurface...

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

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Systems and methods for passively compensating transducers

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

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Systems and methods for producing a sound pressure field

Communications – electrical: acoustic wave systems and devices – Transmitter systems – With beam forming – shaping – steering – or scanning
Reexamination Certificate

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Systems and methods for seismic data acquisition employing...

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

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Systems and methods for steering seismic arrays

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

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Systems and methods implementing frequency-steered acoustic...

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

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Systems and methods of processing impulses including bullet...

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

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Systems for low frequency seismic and infrasound detection...

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

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Systems, apparatus and methods for measuring while drilling

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Patent

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Systems, apparatus and methods for measuring while drilling

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Patent

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Systolic architectures for sonar processing

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

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