4. Optics: image projectors
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Picture information retrieving system

Optics: image projectors – Selective data retrieval – Film strip
Patent

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Platen capable of moving in a plane and particularly adapted for

Optics: image projectors – Selective data retrieval – Plural picture rows on single microcard
Patent

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Portable map display device

Optics: image projectors – Selective data retrieval – Plural picture rows on single microcard
Patent

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Portable microfilm reader

Optics: image projectors – Selective data retrieval – Plural picture rows on single microcard
Patent

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Printed material reader and search method therefor

Optics: image projectors – Selective data retrieval – Film strip
Patent

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Projection apparatus

Optics: image projectors – Selective data retrieval – Film strip
Patent

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Projection apparatus

Optics: image projectors – Selective data retrieval
Patent

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Projection apparatus for photographic transparencies and a devic

Optics: image projectors – Selective data retrieval
Patent

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Projector for transparent file sheet

Optics: image projectors – Selective data retrieval – Plural picture rows on single microcard
Patent

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