4. Ships
  5. Towing or pushing
  6. Submerged object

Carl O. Berglund

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Marine hydrophone

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent

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Means and method for dynamically monitoring the stretch of a sei

Ships – Towing or pushing – Submerged object
Patent

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Method of making a seismic apparatus

Metal working – Piezoelectric device making
Patent

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Noise-cancelling streamer cable

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent

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Piezoelectric transducer unit and hydrophone assembly

Electrical generator or motor structure – Educational or construction units or kits
Patent

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Profile ID: LFUS-PAI-P-547857

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