4. Optics: motion pictures
  5. With sound accompaniment
  6. Common picture and sound record carrier systems
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Self aligning magnetic media follower device

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

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Short circuit for recording head of simultaneous recording cine

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

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Sound motion picture camera

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

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Sound motion picture camera

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

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Sound motion picture camera and sound motion picture system

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

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Sound motion picture projection apparatus

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

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Sound motion picture projector

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

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Sound motion-picture camera

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

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Sound reproduction method and apparatus

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

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Sound system pinch roller actuating device

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

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Sound-film camera

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

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Starting and stopping device for sound motion picture camera

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

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System and method for audio encoding and counterfeit...

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

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