4. Communications, electrical: acoustic wave systems and devices
  5. Signal transducers
  6. Underwater type

Rolf Eberl

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Above and below water sound transducer

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent

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Piezoelectric audio transducer

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Reexamination Certificate

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Strength member for combined fluid/electrical hose

Electricity: conductors and insulators – Combined fluid conduit and electrical conductor
Patent

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Profile ID: LFUS-PAI-P-651869

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