Abstract: In one embodiment, a digital recording medium having digital datum indicia thereon readable by a reader producing a read-wave, the digital recording medium comprising: a photochromic material activatable from a first optical state to a second optical state by radiant energy having energy outside of the read-wave of the reader; and a photobleachable material activatable from a first optical state to a second optical state by radiant energy having energy within the read-wave of the reader.

Abstract: Light sensitive materials applied in shipping materials, including security seals and tear tape, for authentication, discrimination and recognition of items.

Abstract: Methods for the preparation of 7-(dipropylamino)pheno-thiazin-3-ylidene]-dipropylamine.

Abstract: Light sensitive materials applied in shipping materials, including security seals and tear tape, for authentication, discrimination and recognition of items.

Abstract: Light sensitive materials applied in shipping materials, including security seals and tear tape, for authentication, discrimination and recognition of items.

Abstract: A method and system for providing copy-protected optical medium using a substrate having information stored thereon in information pits and information lands, wherein the information lands comprise lands in two different planes.

Abstract: A digital video optical recording medium comprising an optical state change material in the VOB file structure.

Abstract: A method and system for providing copy-protected optical medium using a substrate having information stored thereon in information pits and information lands, wherein the information lands comprise lands in two different planes.

Abstract: A method and system for providing copy-protected optical medium using transient optical state change security materials capable of changing optical state when exposed to a wavelength of about 630 nm to about 660 nm and software code to detect such change in optical state.

Abstract: A computer-readable medium having material at a select position therein and containing instructions for controlling an optical reader to cause the optical reader to re-read the position having the material one or more times to elicit a measurable parameter at such position.

Abstract: A portable product authentication device and method for analyzing key ingredients and the relative amounts of key ingredients in products which in turn enables authentication and monitoring products for authenticity, fraud and quality control is disclosed. Particular light-emissive compounds can be used to identify and quantitate the relative levels of key ingredients in the products. The invention includes a probe assembly for providing a source of light to irradiate a sample product, an optical detector to detect emitted light from the irradiated product and a controller to determine the authenticity or quality of the sample product by comparing the emitted light to a standard. A small sample of the product to be authenticated is tested on site (e.g., at the point of manufacture or at the point of distribution) thereby giving immediate feedback as to its authenticity or quality. The sample, together with the light-emissive compound may be placed on a chip.

Abstract: A method for fabricating read-only copy protected optical medium comprising a light-sensitive material at positions capable of altering the data read during copying of the optical medium but permitting read of the underlying data in the reading of the optical medium.

Abstract: A method for fabricating read-only copy protected optical medium comprising a light-sensitive material at positions capable of altering the data read during copying of the optical medium but permitting read of the underlying data in the reading of the optical medium.

Abstract: A method and apparatus for on-site verification of product authentication and quality includes a microplate having a substrate with a light-emissive compound thereon. The substrate provides immobilization of the light-emissive compounds and provides a three-dimensional environment similar to free solution for reactions with the product sample to occur. The microplate may include any material having desired light reflective properties and a surface to retain the light-emissive compounds therein. A metered amount of light-emissive compound is placed on the microplate by any desired metering method, such as hand-metering by skilled technicians, automatic metering using robotic equipment, or printing using for example, piezoelectric dispensing technology. In this respect, the light-emissive compound is placed on a microplate, with the microplate. Once the light-emissive compound is applied to the substrate, the microplate may be sent to the test site where product testing is to be performed.

Abstract: A portable product authentication device and method for analyzing key ingredients and the relative amounts of key ingredients in products which in turn enables authentication and monitoring products for authenticity, fraud and quality control is disclosed. Particular light-emissive compounds can be used to identify and quantitate the relative levels of key ingredients in the products. The invention includes a probe assembly for providing a source of light to irradiate a sample product, an optical detector to detect emitted light from the irradiated product and a controller to determine the authenticity or quality of the sample product by comparing the emitted light to a standard. A small sample of the product to be authenticated is tested on site (e.g., at the point of manufacture or at the point of distribution) thereby giving immediate feedback as to its authenticity or quality. The sample, together with the light-emissive compound may be placed on a chip.

Abstract: Highly efficient, low cost, methods and compounds to determine product authenticity, tampering, manufacturing compliance are provided. The methods and chemicals defined are capable of measuring the relative amount of key materials in these products. The compounds are light emitting and interact with key elements in products like, neutral spirits, vodka, tequila, soft drinks and infant formulas. After the interactions are complete, methods are employed to determine resulting key components by light emission.

Abstract: Highly efficient, low cost, methods and compounds to determine product authenticity, tampering, manufacturing compliance are provided. The methods and chemicals defined are capable of measuring the relative amounts of key materials in these products. The compounds are light emitting and interact with key elements in products like, neutral spirits, vodka, tequila, soft drinks and infant formulas. After the interactions are complete, methods are employed to determine resulting key components by light emission.

Abstract: A method and system for determining the authenticity of an item such as an original work of art, an art print, valuable jewelry or other valuable items utilizes images of one or more unique patterns of features, preferably at a microscopic level, as one or more "signatures" of the item. The image of this unique signature is recorded and stored electronically as data representing the unique pattern. The data are registered with identifying text and stored in a secure storage location, to prevent unauthorized duplication or use of the stored data. Following this registration and storage, an item presented as authentic can be examined microscopically at prescribed sites on the item where the original images were taken. Comparison is made at one or more of the sites, and a decision is made as to whether the item exhibits substantially identical features to those originally registered, so as to be the same authentic item. Comparison can be made electronically or visually/microscopically.

Abstract: A method and system for determining the authenticity of an item such as an original work of art, an art print, valuable jewelry or other valuable items utilizes images of one or more unique patterns of features, preferably at a microscopic level, as one or more "signatures" of the item. The image of this unique signature is recorded and stored electronically as data representing the unique pattern. The data are registered with identifying text and stored in a secure storage location, to prevent unauthorized duplication or use of the stored data. Following this registration and storage, an item presented as authentic can be examined microscopically at prescribed sites on the item where the original images were taken. Comparison is made at one or more of the sites, and a decision is made as to whether the item exhibits substantially identical features to those originally registered, so as to be the same authentic item. Comparison can be made electronically or visually/microscopically.