4. Optics: motion pictures
  5. With sound accompaniment
  6. Common picture and sound record carrier systems
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Transducer backup assembly for sound motion picture film handlin

Optics: motion pictures – With sound accompaniment – Common picture and sound record carrier systems
Patent

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Transport mechanism for sound cine camera or the like

Optics: motion pictures – With sound accompaniment – Common picture and sound record carrier systems
Patent

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Trigger device for sound motion picture cameras

Optics: motion pictures – With sound accompaniment – Common picture and sound record carrier systems
Patent

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