4. Optics: motion pictures
  5. Optical rectifier type
  6. Refractor
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Device for direct cinematographic viewing of stereoscopic images

Optics: motion pictures – Optical rectifier type – Refractor
Patent

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Device to correct the malfunction in film feed of a perforated f

Optics: motion pictures – Optical rectifier type – Refractor
Patent

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Driving device for the elimination of the use of perforations fo

Optics: motion pictures – Optical rectifier type – Refractor
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