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

Lars Stahl

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Device for generating sound

Communications: electrical – Audible indication – Electronic
Reexamination Certificate

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Surface element and a device for generating sound

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

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Profile ID: LFUS-PAI-P-1962362

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