4. Card, picture, or sign exhibiting
  5. Photographic transparency viewer, e.g., x-ray viewer
  6. Portable slide viewer
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Slide sorter and viewer

Card – picture – or sign exhibiting – Photographic transparency viewer – e.g. – x-ray viewer – Portable slide viewer
Patent

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System to distribute slides onto a transparent screen

Card – picture – or sign exhibiting – Photographic transparency viewer – e.g. – x-ray viewer – Portable slide viewer
Patent

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