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

Donald R. Campbell

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Vibratory, time variant, pseudorandom sonar system

Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
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Wheel traction log assembly

Resilient tires and wheels – Tires – resilient – Anti-skid devices
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Profile ID: LFUS-PAI-P-674131

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