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

Thorbjorn N. Christiansen

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Apparatus for controlling an automatic angling machine connected

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

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Apparatus for detaching fishes from fish-hooks on a fishing line

Fishing – trapping – and vermin destroying – Fishing – Gathering or catching device with conveyer to boat
Patent

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Arrangement in an automatic angling machine

Fishing – trapping – and vermin destroying – Fishing – Motor-operated
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Profile ID: LFUS-PAI-P-1448929

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