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5811152 |
Method of identifying a surface
A method for identifying a surface in which a plurality of trace material is used to establish a database in which a unique combination of trace materials is assigned to a unique source. A...
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5789019 |
Method for protecting against forgery sheet-like printed documents
A method for protecting against forgery a printed document comprises the step of applying on the document, during the printing thereof, a microcapsule layer. This layer comprises microcapsules...
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5772249 |
Method of generating a security design with the aid of electronic means
A net of parallel lines is generated with the aid of a computer. The ratio of the width to the spacing of two consecutive lines is equal to r o . The spacing and width of the lines are successively...
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5759613 |
Combatting of unauthorized tampering with identification marks
The invention provides a method of treating an artifact to combat unauthorized tampering with the identity thereof. The method comprises forming a coating on at least part of a surface of the...
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5707680 |
Method for reducing invalid acceptances of expired printed offers and end-consumer re-distribution of printed works
There is disclosed a method for the time-delayed defacement of all or part of a printed work, such as a time-dependent coupon. Such method comprises applying opaque print onto a substrate and...
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5662735 |
Chemical solution for detecting counterfeit paper currency
This invention relates to a solution for detecting counterfeit paper currency. The solution contains iodine at a concentration of from 0.005 to 3 grams/liter and one or more solvents selected from...
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RE35599 |
Method and apparatus for enhancing a randomly varying security characteristic
A randomly varying modulated current is generated and used to drive a magnetic write head in an apparatus for enhancing a randomly varying magnetic security characteristic of a medium. The write...
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5631039 |
Security thread, a film and a method of manufacture of a security thread
The present invention relates in one aspect to a method of manufacture of a security thread suitable for use in security articles including security paper such as that used for banknotes. In the...
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5605738 |
Tamper resistant system using ultraviolet fluorescent chemicals
A release agent is first applied to a target article and on top of the release agent is applied an ultraviolet radiation fluorescent material to enable fraud detection. To prevent fraud, a security...
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5599578 |
Technique for labeling an object for its identification and/or verification
The present invention is addressed to providing a simple, yet reliable method for labeling an object for its verification. The present invention includes applying a mark to said object with a...
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5538753 |
Security element
A security element for the authentication of a substrate has a pattern comprising optical diffraction elements which are embossed in a carrier material of plastic material and unembossed neutral...
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5516362 |
Security marking method and composition
A security marking method and composition wherein a first marking is applied to a surface of a substrate with a mixture of a printing medium and a first composition, wherein the first marking is...
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5462597 |
System for inkless fingerprinting
A fingerprinting system comprising means capable of releasably retaining a liquid and a liquid composition releasably retained in said means, said liquid composition comprising a leuco color-former...
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5423432 |
Water-dissipatable polyesters and amides containing near infrared fluorescent compounds copolymerized therein
Provided are water-dissipatable, sulfo-containing polyesters and polyester-amides having copolymerized therein thermally stable near infrared flourophoric compounds. The polymers are useful in...
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5419920 |
Method for marking an object to enable its detection from a distance in the event of loss or theft
A quantity of at least one odorous substance that is physiologically impossible to perceive by the human sense of smell, but which is sufficient to be perceived at a distance by an animal known to...
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5407535 |
Manufacture of lottery tickets
The invention relates to a new lottery ticket paper for the manufacture of different kinds of lottery tickets, especially of the "instant lottery ticket" type, and a method of manufacturing said...
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5393556 |
Composition and method for detecting counterfeit paper currency
A composition for detecting the starch content in counterfeit paper currency comprising an aqueous-alcohol solution of iodine and acetic acid and method of applying same to paper currency genuine...
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5367319 |
Security protection for important documents and papers
A method and apparatus for forestalling counterfeiting is disclosed which allows a counterfeit document to be identified relatively easily by an average person. The present invention employs a...
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5306520 |
Method of discriminating an article
This invention relates to a method of discriminating an article which includes steps of finishing the article to make it have a smooth base surface, applying a transparent reflective film on the...
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5296949 |
Optical authentication device
An optical device for receiving incident light having a minimum wavelength, and for producing a resultant light containing an optical image. The device includes a first material having a first...
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5282917 |
Method of making a product having a concealed message
A wagering, promotional or novelty product having a concealed message includes a sheet having an outer surface, ink visibly disposed on the outer surface in a first pattern, and transparent film...
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5264081 |
Forgery-proof safety paper
This invention relates to the paper-making domain and especially to a forgery-proof safety paper, which includes on its surface and/or in its mass, at least one compound responding to formula:...
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5261954 |
Authenticatable security paper and authenticating composition therefor
A security paper authenticating system comprises, in combination, a security paper carrying both starch and an iodate salt, typically potassium iodate, and an authenticating composition comprising...
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5194289 |
Method for labeling an object for its verification
Disclosed is a method for labeling an object for its identification. The method comprises applying a selected person's fingerprint to said object at a predetermined location upon said object. Next,...
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5160171 |
Security coding
A method of security coding an article which comprises applying to the article an identification mark comprising at least one colorless or weakly-colored infra-red absorbing material and an article...
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5156717 |
Non-fluorescent forgery-proof safety paper and document obtained
This invention relates to paper-making and in particular to non-fluorescent forgery-proof safety paper which is characterized in that it comprises, on its surface and/or in its mass, a salt of...
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5149386 |
Tamper-evident structures
The invention relates to a laminated tamper-evident structure which exhibits an irreversible color change upon delamination. The structure includes a laminate of at least two layers capable of...
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5139812 |
Method and apparatus for high security crypto-marking for protecting valuable objects
A high security crypto-marking method for protecting valuable objects in which a target chemical compound suitable for subsequent detection by an appropriate detection means is applied to an object...
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5114735 |
Fragrance enhanced scratch-off layer for game cards
A scratch-off game piece which contains a fragrance which is released during the game play action. The game piece is constructed by application of layers of fragrance containing material and...
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5093147 |
Providing intelligible markings
A method for providing intelligible markings that are virtually invisible to the unaided eye on the surface of an article, comprises: applying onto the surface, by a jet printing process, a marking...
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5087507 |
Method of rendering a document or portion of it resistant to photocopying
An article with at least a portion carrying symbols representing information to be protected against photocopying is formed by a carrier, a continuous layer covering the portion of the carrier and...
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5021318 |
Process for forming secure images
Disclosed is a process for forming secure images which comprises electrostatically charging an imaging member; imagewise exposing the charged member, thereby forming a latent image on the member;...
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5009919 |
Finger-printing systems & method
A fingerprinting system comprising means capable of releasably retaining a liquid and a liquid composition releasably retained in said means, said liquid composition comprising a leuco chromogenic...
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4999075 |
Processes of mass manufacturing a plurality of security cards and processes of manufacturing security card substrates from which a plurality of security cards may be further manufactured
Process of mass manufacturing a plurality of security cards including the steps of embossing a surface of a layer of plastic film at first locations with visual image producing devices such as...
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4945708 |
Method of making a tamper resistant package
The invention provides a package and associated method for packaging of products which enhances the resistance to tampering with or adulteration of the product, and which also permits a readily...
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4925705 |
Method of printing layers having substantially exact registration
A method of printing a number of superimposed or otherwise geometrically related layers on a substrate with exact registration which comprises printing said layers over one or more areas on said...
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4892385 |
Sheet-material authenticated item with reflective-diffractive authenticating device
An improved authenticating device comprises a substrate bonded to the sheet material, the substrate having a reflective diffractive structure formed as a relief pattern on a viewable surface...
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4890763 |
Tamper resistant package and method of making same
The invention provides a package and associated method for packaging of products which enhances the resistance to tampering with or adulteration of the product, and which also permits a readily...
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4867481 |
Anti-photocopying paper and/or anti-telefacsimile paper
Paper is provided with resistance to photocopying or transmission by telefacsimile by spatial spectral modulation of the paper reflectance at a specific single or preferably multiple frequencies....
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4816322 |
Anticounterfeit metallized labels
An electrosensitive substrate from which a metallized surface layer is selectively removed using electrosensitive printing to expose a patterned underlayer. The patterned underlayer may be randomly...
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4812171 |
Irreversible photochromic markings
A photochromic ink composition which comprises a solution of a 1,2-dihydroquinoline (DHQ) in a polymer solution, the dihydroquinoline being sensitive or sensitized to ultra-violet light.
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4791449 |
System for prevention of unauthorized copying
A web having phosphor particles uniformly distributed on at least one outer surface of the web, the phosphor particles being substantially white or colorless under ambient room light illumination...
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4744328 |
Sealant compositions and methods for use in detecting equipment tampering
Sealant compositions and methods which are particularly adaptable for use in detecting movement between two or more adjacent surfaces. The preferred sealant composition of the present invention is...
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4691940 |
Printed security with hallmarks
The invention relates to a printed security with a hallmark in the form of a coating applied in a vacuum to the surface of the security. This coating is so thin that it is almost invisible even as...
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4680458 |
Laser recording and storage medium
An optical data recording and information storage medium which uses an exposed and developed photosensitive medium with a transparent substrate to store prerecorded data spots. A reflective laser...
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4662653 |
Optically diffracting security element
A security element for authenticating bank notes, credit cards, security passes and the like is disclosed. The security element incorporates a reflective-type diffraction grating, which grating...
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4626445 |
Method of manufacturing an optical interference authenticating device
Hard to simulate, readily distinguishable from counterfeits, optical interference authenticating devices are provided by depositing two coatings on a substrate, each coating comprising at least one...
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4606927 |
Article identification
A minute color coded identifier having a longitudinal axis, which is transversely color banded about its periphery. The identifier may, for example, be 0.015 inch long, have a transverse dimension...
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4579370 |
Multi-tone cancellation phrase and background
A protected document has a cancellation phrase, normally invisible to the human eye, which will appear if the document is copied on a color copier. The protection of these documents is improved in...
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4579371 |
Document having concealed electrically conductive authenticating layer
A standardized document such as a credit card or drivers license contains an electrically conductive authenticating layer which is not visually discernible and has an electrical resistivity of less...
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