4. Communications, electrical: acoustic wave systems and devices
  5. Echo systems
  6. Returned signal used for control

Huibert B. Langeraar

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Direction finding apparatus

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent

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Frequency measuring circuit in a passive radar receiver

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent

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Interference suppression unit for a sonar apparatus

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

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Sonar

Communications – electrical: acoustic wave systems and devices – Transmitter systems
Patent

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Profile ID: LFUS-PAI-P-254958

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