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

Yasuhiko Oka

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Apparatus for processing fish detection signals

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

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Refrigerant circuit

Refrigeration – Automatic control – Refrigeration producer
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1425227

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