4. Optics: image projectors
  5. Unitary plural refracting surfaces
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Desk level overhead projector

Optics: image projectors – Unitary plural refracting surfaces
Patent

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Device with micro-filters for selecting colors and images

Optics: image projectors – Unitary plural refracting surfaces
Patent

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Distortion correction for an overhead projector system

Optics: image projectors – Unitary plural refracting surfaces
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Distortion correction for an overhead projector system

Optics: image projectors – Unitary plural refracting surfaces
Patent

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