LandOfFree - US Patents - Listing for Communications, electrical: acoustic wave systems and devices,Echo systems,Presence or movement only detection

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Means for reducing minimum sensing distance of an ultrasonic pro

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Method and apparatus for detecting intrusion and...

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Reexamination Certificate

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Method and apparatus for monitoring swimming pools

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Method and apparatus for plural document detection

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Reexamination Certificate

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Method and system for detecting objects at or below the water's

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Method and system for identifying moving objects using...

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Reexamination Certificate

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Method for selecting the mode of operation of an object counting

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Method of, and circuit arrangement for, function control of ultr

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Method of, and circuit arrangement for, function control of ultr

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Mounting apparatus for the sonic transducer of a fish-finder

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Movement-detecting processing circuit for an ultrasonic detectio

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Moving object detecting device

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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Moving object detection system

Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection

Patent

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