4. Photography and optical equipment
  5. Projector or viewer
  6. Integrated unit

Margaret A. Craig

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Ball shaped transparency viewer

Photography and optical equipment – Projector or viewer – Integrated unit
Patent

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Baseball shaped transparency viewer

Photography and optical equipment – Projector or viewer – Integrated unit
Patent

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Football shaped transparency viewer

Photography and optical equipment – Projector or viewer – Integrated unit
Patent

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Puck shaped transparency viewer

Photography and optical equipment – Projector or viewer – Integrated unit
Patent

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Profile ID: LFUS-PAI-P-739866

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