4. Card, picture, or sign exhibiting
  5. Photographic transparency viewer, e.g., x-ray viewer
  6. Hand held slide viewer

David L. Adrian

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Card carrying microfilm and associated reading lens

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

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Card carrying microfilm and associated reading lens

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

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Card carrying microfilm and associated reading lens and process

Card – picture – or sign exhibiting – Check – label – or tag – Permanent identification device
Patent

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Profile ID: LFUS-PAI-P-715201

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