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Self-masking transparency viewing apparatus

Card – picture – or sign exhibiting – Photographic transparency viewer – e.g. – x-ray viewer
Reexamination Certificate

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Self-masking transparency viewing apparatus

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

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Self-masking transparency viewing apparatus

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

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Slide filing and retrieval system

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

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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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Slide sorters

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

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Slide viewer or projector

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

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Supporting leg assembly for an illuminated transparency viewer

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