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US 5,856,266 AGranted
Copy restrictive documents
AssigneeEastman Kodak Company
InventorsJohn Gasper, James Edward Sutton
Life of this patent
Estimating the term…
Abstract
A media for restricting the copying of a document utilizing one or more microdots that are embedded in said document for providing a non-visual, but machine detectable mark or marks. The detected means for detecting the presence of one or more microdots in said document inhibits a copy machine from copying the document.
Claims18
A copy restrictive medium comprising:
- a support layer;
- and
- at least one image-forming layer capable of forming an image from a latent image of a pattern of visually undetectable microdots;
- wherein said microdots are detectable by opto-electronic means which are capable of deactivating a printing device.
1 more element
A copy restrictive medium comprising:
- a support layer;
- and
- at least one image-forming layer capable of forming a yellow image from a latent image of a pattern of visually undetectable microdots;
- wherein said microdots are detectable by opto-electronic means which are capable of deactivating a printing device.
1 more element
A copy restrictive photographic medium comprised of:
- a support layer;
- and
- at least one image-forming layer containing radiation sensitive silver halide coated on said support layer that is capable of forming a yellow image from a latent image of a pattern of visually undetectable microdots;
- wherein said microdots are detectable by opto-electronic means which are capable of deactivating a printing device.
1 more element
Dependencies are inferred from the claim text.