4. Miscellaneous active electrical nonlinear devices, circuits, and
  5. Signal converting, shaping, or generating
  6. Amplitude control

ESSI Corporation

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Helmholtz resonator type marine signal

Signals and indicators – Nautical
Reexamination Certificate

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Marine fog horn

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible
Design Patent

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Universal acoustic power amplifier

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent

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Profile ID: LFUS-PAI-P-1439452

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