4. Optics: image projectors
  5. Projector or screen removable from common housing

Rolf Dieckhoff

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Apparatus having a picture screen for the display of picture seq

Optics: image projectors – Projector or screen removable from common housing
Patent

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Audio-visual projector

Photography and optical equipment – Projector or viewer – With provision for transparency magazine
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Projector

Optics: image projectors – With sound accompaniment
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Profile ID: LFUS-PAI-P-942332

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