4. Communications, electrical: acoustic wave systems and devices
  5. Distance or direction finding
  6. By combining or comparing signals

Robert L. Steadman

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Alerting system for a facility

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

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Externally cued aircraft warning and defense

Communications: directive radio wave systems and devices (e.g. – Radar ew – Ecm
Reexamination Certificate

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System and method for detecting emplacement of improvised...

Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2174333

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