4. Optics: motion pictures
  5. With rewinding of film strips
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Projector auto rewind mechanism

Optics: motion pictures – With rewinding of film strips
Patent

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Projector reset-auto stop mechanism

Optics: motion pictures – With rewinding of film strips
Patent

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Rapid film rewind mechanism

Optics: motion pictures – With rewinding of film strips
Patent

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Reversing film projection system

Optics: motion pictures – With rewinding of film strips – During projection of another film strip
Patent

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Spooling arrangements for endless band material

Optics: motion pictures – With rewinding of film strips – During projection of another film strip
Patent

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