Data protection structure
AssigneeOptaglio Limited
InventorJohn Drinkwater
Life of this patent
Estimating the term…
Abstract
The present invention provides for a data protection device comprising an optically variable diffractive scratch-layered structure overlying data to be protected, wherein the device includes at least first and second opaque metallic layers separated by a flexible light-absorbing separation layer.
Claims11
A data protection device comprising an optically variable diffractive scratch-layered structure overlying data to be protected, wherein the device includes first and second opaque metallic layers separated by a high opacity black flexible light-absorbing scratch-off separation layer, and also includes at least one further opaque metallic layer separated from at least one of the first and second opaque metallic layers by a further high opacity black flexible light-absorbing scratch-off separation layer.
Dependencies are inferred from the claim text.