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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 exploder

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Acoustic logic circuits

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Acoustic obstruction detector and method

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Acoustic ranging apparatus and method

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

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Acoustic signal detection circuit

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Acoustical proximity detection for mobile terminals and...

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

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Adaptable filtering device and method for filtering sonar signal

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Apparatus and method for detecting sonar signals in a noisy...

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Apparatus and method for distance determination

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Apparatus and method for measuring relative phase of signals in

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Apparatus and method using controlled emission for sensing...

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Apparatus for controlling an automatic angling machine connected

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Audio railway crossing detector

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Aural enhancement of active sonar systems

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Automatic wafer focusing and flattening system

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Automobile distance measuring apparatus

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Binaural ultrasound detector and imager

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
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Bistatic Doppler underwater intrusion detection sonar

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