4. Optics: motion pictures
  5. With sound accompaniment
  6. Picture and sound synchronizing

Francis Chauvet

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Piezoelectric or similar transducer device with an...

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate

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Signaling device with light emitting diode

Electricity: circuit makers and breakers – Electric switch details – Indicators
Patent

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Synchronizing means for motor-drive systems

Optics: motion pictures – With sound accompaniment – Picture and sound synchronizing
Patent

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Profile ID: LFUS-PAI-P-1627282

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