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US 4,673,609 AGranted
Unidirectional panel
OwnerGeorge R. Hillinventor
Life of this patent
Estimating the term…
Abstract
A panel which comprises a substrate of transparent or translucent material having applied to one or both sides a design superimposed on, or forming part of, an opaque pattern so that the design on one side of the panel cannot be seen from the other side.
Claims28
A panel comprising:
- a sheet of light permeable material;
- and
- a design formed on said sheet, said design visible from one side of the panel and not visible from the other side of the panel, said design being superimposed on or forming a part of a silhouette pattern and wherein said design is decreasingly perceptible from the side of the panel from which said design is normally visible as the level of illumination through the panel from the other side increases.
A glazing assembly comprising:
- a first panel of light permeable material;
- a second panel of light permeable material;
- at least one design formed on said first panel, said design visible from one side of said first panel and not visible from the other side of said first panel, said design being superimposed on or forming a part of a silhouette pattern and wherein said design is decreasingly perceptible from the one side of the first panel as the level of illumination through the panel from the other side of the first panel increases;
- and
- at least one second design formed on said second panel, said second design visible from one side of said second panel and not visible from the other side of said second panel, said second design being superimposed on or forming a part of said silhouette pattern and wherein said second design is decreasingly perceptible from the one side of the second panel as the level of illumination through the panel from the other side of the second panel increases.
2 more elements
Dependencies are inferred from the claim text.