Robert M. O'Neill

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Acoustic wave generating apparatus and method

Electrical generator or motor structure – Dynamoelectric – Reciprocating
Reexamination Certificate

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Acoustic wave generating apparatus and method

Electrical generator or motor structure – Dynamoelectric – Reciprocating
Reexamination Certificate

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Helmholtz resonator type marine signal

Signals and indicators – Nautical
Reexamination Certificate

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Helmholtz resonator type marine signal

Signals and indicators – Nautical
Reexamination Certificate

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Loud speaker with minimized magnetic leakage

Patent

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Profile ID: LFUS-PAI-P-229732

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