4. Communications, electrical: acoustic wave systems and devices
  5. Echo systems
  6. Distance or direction finding

Frank Hoenes

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Apparatus for distance measurement by means of ultrasound

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

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Distance-measuring device

Data processing: vehicles – navigation – and relative location – Relative location – Collision avoidance
Reexamination Certificate

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Method and an arrangement for detecting an obstacle

Communications: electrical – Land vehicle alarms or indicators – Of relative distance from an obstacle
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1164856

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