4. Optics: motion pictures
  5. Camera and/or projector drive mechanisms
  6. With film engaging claws reciprocally driven to engage film
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Recording- or reproducing apparatus

Optics: motion pictures – Camera and/or projector drive mechanisms – With film engaging claws reciprocally driven to engage film
Patent

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Reversible intermittent film drive for motion-picture projector

Optics: motion pictures – Camera and/or projector drive mechanisms – With film engaging claws reciprocally driven to engage film
Patent

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