Matches 101 - 150 out of 165 < 1 2 3 4 >
Match Document Document Title
4551294 Molding composition based on vinyl chloride polymers, and process for the manufacture of films from these molding compositions for the production of forgery-proof valuable documents  
The novel molding compositions with vinyl chloride polymer as the main constituent contain, in a specific quantity in each case, certain impact strength modifiers, polymethyl methacrylate and a...
4544184 Tamper-proof identification card and identification system  
A tamper-proof and wear resistant identification card having a support layer, a strip of magnetic tape for containing encoded information, transparent layers covering the front and rear surfaces of...
4540595 Article identification material and method and apparatus for using it  
An ink that fluoresces in the near infrared is used to mark documents such as bank checks for automatic identification. Markings with this ink are reliably detectable, even in the presence of other...
4526752 Oxygen indicator for packaging  
A tamper-resistant package containing in an anerobic environment a leuco dye free of reducing agent which dye becomes colored upon reaction with oxygen.
4522670 Process for manufacture of tamper-resistant polyester credit cards  
The present invention relates to a credit card or identification card fabricated from amorphous polyester sheet material wherein at least the area of said card containing embossed numerical or...
4522429 Method of rendering documents resistant to photocopying, and anti-copying paper and ink therefor  
Confidential information is printed, typed or otherwise applied to paper with a color having a reflection spectral response or less than about 10% for light with a wave-length below about 600...
4520063 Forgery-proof flat article of a synthetic resin, and process for the production thereof  
A forgery-proof flat article, for example, for the production of banking cards, credit cards, and the like, is provided with a security feature analogous to a watermark and is made of thermoplastic...
4511616 Anticounterfeit magnetic metallized labels  
An electrosensitive security laminate including a magnetic layer providing a magnetically encodable substrate. The laminate includes a base layer such as paper, a magnetic layer deposited on the...
4507349 Security medium and secure articles and methods of making same  
A security medium, secure articles made therefrom and methods of making same. Articles are disclosed which are resistant to counterfeiting and unauthorized alteration and which are suitable for use...
4488646 Tamper-indicating sheet  
A novel lottery ticket comprising a blush-type coating which coating is characterized by susceptibility to a change in appearance when exposed to either (a) any of a wide spectrum of organic...
4486033 Sublimable dye imaging of lottery ticket and commercial game coupon and the like  
A process for permanently imaging data on lottery tickets and the like which comprises of steps of; providing an ink receptive, non-shrinking resinous coating on a webbed coupon substrate and heat...
4478681 Forgery-proof paper  
Forgery-proof paper, which exhibits a distinct coloration when treated with an oxidizing agent and, if appropriate, a reducing agent, contains, as the reagent, a compound of the formula ##STR1##...
4463970 Security paper having camouflage materials to protect its authenticity features  
A data carrier having excitable marking materials to record information in code and further materials to camouflage them, as well as a method of producing this type of data carrier. The coded...
4462039 Plastic identification card having an improved signature panel  
This invention relates to a plastic identification card with an improved signature panel. There is a problem with existig credit cards in that the existing signature can be obscured by printing...
4456667 Tamperproof document and a process for producing the same  
The tamperproof document consists of a photographic material as information carrier which is laminated on one or both sides with a transparent foil. The foil is attached to the surface of the...
4428997 Protective coatings for documents  
Protective coatings for securing documents from alteration comprising a noncohesive adhesive layer integrated with a verification feature and a method for applying such coatings.
4425769 Method for treating a gem and gem treated with this method  
A method for treating a gem stone to cause a marking thereon, wherein a photoresist resin is secured to the stone, a photographic film bearing the desired marking is applied over said resin, said...
4420515 Metallization process for protecting documents of value  
A process for preventing the counterfeiting of valuable documents through use of photography, photocopying techniques, or other methods of counterfeiting. The process includes laminating an...
4411946 Impregnating paper with 7-hydroxy-coumarin compounds  
7-Hydroxy-coumarin compounds of the general formula ##STR1## wherein A represents a heterocyclic radical, which can contain non-ionic substituents customary in dye-stuff chemistry, R represents...
4387112 Article identification process and articles for practice thereof  
Ordinary articles involved in transactions that require ascertaining authenticity of the article, such as wearing apparel, electronic parts, identification cards, or credit cards, may be identified...
4360548 Self-contained covert image  
A hidden image, which can be made detectable by rubbing, is produced by applying to a substrate surface a first ink-like material in image configuration, then applying a second ink-like material to...
4352706 Process for applying a metallic image in register to a document of value  
A valuable document is protected from counterfeiting by applying an extremely thin layer of metal to the document at predetermined locations. The thin layers of metal form a "ghost image" which...
4303701 Method of marking plastic lenses  
A method of marking plastic lenses to selectively identify a lens by impregnating a fluorescent material into the surface of the lens so that when the lens is exposed to ultraviolet light it...
4299637 Method of making a game ticket  
A method for making a game ticket, such as for example a lottery ticket, is disclosed in which the ticket has a base sheet and a cover sheet adhesively joined together in peripheral portions of...
4277514 Forgery resistant document with colored areas and method for thwarting reproduction of same  
A document with a color pattern which is resistant to forgery by photo reproducing process, at least a portion of the color pattern comprising, a coloring material having a spectral reflection...
4259391 Indicia bearing plastic laminate and method of producing same  
A transparent indicia bearing plastic laminate embodying in one integral portion thereof general information and in firmly bonded relation therewith a second portion incorporating specific data...
4258073 Taking of finger prints  
A first method of revealing a fingerprint involves the charging of the surface bearing the fingerprint to a high electric potential and applying finely divided carbon to the charged surface to form...
4250217 Documents embossed with machine-readable information by means of an embossing foil  
There is described a process for embossing onto a document machine-readable information in the form of optical markings with a light-modifying relief structure for indicating the genuineness of the...
4243734 Micro-dot identification  
Micro-dots carrying indicia identifying the owner of an article and the method of preparing and using such micro-dots. The micro-dots are small pieces of foil of any of several shapes with square...
4239832 Adhesively correctable transfer medium with delayed alteration resistance characteristics  
The present invention relates to an ink formulation which may be coated on a flexible substratum to produce a typewriter ribbon or the like, wherein impressions made from such a ribbon are capable...
4238524 Process for identification marking clear plastic articles  
A fade resistant, visually undetectable identification mark is imparted to an optically clear plastic lens or the like by providing a marking composition comprising a fluorescent dye and a liquid...
4184701 Tamper proof label  
This invention relates to tamper-proof labels useful for marking objects in a manner such that, if one were to attempt to transfer the label to another object, the label would be destroyed or...
4183554 Semi-laminated security pouch  
A semi-laminated security pouch for a tamper proof identification card is disclosed. The identification card to be protected by the security pouch has a glass bead security coating on a front face...
4183989 Security papers  
A security paper which contains a security device e.g. a strip, thread or planchette having at least two machine verifiable security features thereon, one of which is a magnetic material, which may...
4176859 Non-counterfeitable documents  
An invalidating marking appears on photoreproductions of security documents such as checks, bonds, stock certificates, lottery tickets, and currency. The invalidating marking is disguised on the...
4143891 Negotiable document  
The negotiable document which may be used, e.g. by airlines includes a cover sheet provided with a hot spot carbon or other image transfer medium and at least one underlying sheet fully or partly...
4136229 Security paper  
Security paper which immediately reveals an attempt to alter handwriting thereon by the use of an alkaline ink remover and which is characterized by the incorporation therein of a pyrenesulphonic...
4124947 Graphic pattern or the like and method of producing the same  
A method of producing a graphic pattern and a graphic pattern for imprinting substrates, such as documents, especially paper currency, stamps or the like, with lines in the form of lengthwise...
4121961 Method of label installation  
A method of label installation employing two sheets suitably coated to produce an image on the underside of the upper transparent sheet and thereafter applying the upper sheet to a label receiving...
4121003 Tamper indicating labels  
This invention relates to switch-proof labels useful for marking objects in a manner such that, if one were to attempt to transfer the label to another object, the label would be destroyed or...
4092449 Alteration-sensitive imprinted article  
An alteration-sensitive imprinted article made of a durable, flexible plastic sheet material has two opposing surfaces, at least one of which is capable of retaining an ink coating. A positive...
4066280 Documents of value printed to prevent counterfeiting  
These documents of value are printed so as to prevent copying, and particularly the counterfeiting of documents of value, with the aid of modern color copiers. For that purpose, part of the...
4051295 Alteration-sensitive surface  
This invention provides an article having an alteration-sensitive surface, generally a sheet material formed of spun continuous strands of fine interconnected fibres of polyolefin, which are bonded...
4037007 Document authentification paper  
Paper for use in the production of security documents incorporates planchettes which have incorporated therein or applied thereto a substance which is capable of taking part in a color-forming...
4033059 Documents of value including intaglio printed transitory images  
An imprint of inked intaglio pattern elements such as lines on a document of value or the like, including background portions and readily recognizable image portions each formed by pattern elements...
3930924 Process for making identification cards  
A method of making an identification card which comprises making any required characters, designs and/or embossings on the base material of the card, further providing a colored layer on the bass...
3895755 Tamper proof envelope  
An envelope which cannot be opened by unauthorized persons after being sealed, without exhibiting signs of such tampering. In one form, the top flap portion carries a bonding layer on its lower...
3886083 Safety inks and documents  
This safety ink is useful for printing a background of fine lines or dots on a document of value, such as a bank check. The background extends over an area which is adapted to be written upon. If...
3880706 Security paper containing fused thermoplastic material distributed in a regular pattern  
A method of making security paper such as paper for currency notes and paper made by the method. The method comprises incorporating in the body of the paper thermoplastic material, such as...
3867164 Imprinting device having conformable film with wet applied ink for the formation of finger and footprints  
A device having a thin conformable film with one inked surface and in an exemplary embodiment being mounted on a frame member whereby by the light application of finger or footprint pressure an...
Matches 101 - 150 out of 165 < 1 2 3 4 >