Matches 1 - 12 out of 12


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7529385 Marking articles using a covert digitally watermarked image  
A marking system that includes forming at least one marking in or on an article, wherein the image formed is not visible to the unaided human observer, and further contains at least one digital...
7184569 Marking articles using a covert digitally watermarked image  
A marking system that includes forming at least one marking in or on an article, wherein the image formed is not visible to the unaided human observer, and further contains at least one digital...
US20070269652 Optical Disk  
The present invention provides an optical disk that has a substrate, an information recording layer or an information-recording unit, a semi-transparent reflection layer and an image-recording...
US20070145735 Marking articles using a covert digitally watermarked image  
A marking system that includes forming at least one marking in or on an article, wherein the image formed is not visible to the unaided human observer, and further contains at least one digital...
US20030005304 Marking articles using a covert digitally watermarked image  
A marking system that includes forming at least one marking in or on an article, wherein the image formed is not visible to the unaided human observer, and further contains at least one digital...
7393623 Incorporation of markings in optical media  
Optical media having markings that are non-interfering, or substantially non-interfering with readout of data from the optical media are disclosed. The optical media make use of certain...
US20080046908 Original glass plate, method of producing original glass plate, stamper for optical recording medium, and method of producing stamper  
A disc-shaped original glass plate for producing a stamper for roughening a substrate of an optical recording medium, containing a circular 21st area within a radius D1 from the center of the...
US20090008257 METHOD OF PRODUCING STAMPER FOR OPTICAL RECORDING MEDIUM, METHOD OF PRODUCING SUBSTRATE, AND METHOD OF PRODUCING OPTICAL RECORDING MEDIUM  
A method of producing a stamper for roughening a substrate of an optical recording medium contains the steps of placing a conductive ring having a hole at the center thereof on a major surface of...
US20090274034 OPTICAL RECORDING MEDIUM, VISIBLE INFORMATION RECORDING METHOD AND METHOD FOR USING DYE COMPOUND  
There is provided an optical recording medium having, on a substrate, a visible information recording layer including a dye compound represented by Formula (1). In Formula (1), Ra1, Ra2, Ra3, Rb1,...
US20080237912 METHOD OF PRODUCING STAMPER FOR OPTICAL RECORDING MEDIUM, METHOD OF PRODUCING SUBSTRATE, METHOD OF PRODUCING OPTICAL RECORDING MEDIUM, AND APPARATUS FOR PRODUCING STAMPER FOR OPTICAL RECORDING MEDIUM  
In a method of producing a stamper for roughening a substrate of an optical recording medium, a masking treatment is carried out prior to a blasting treatment, whereby a second pit forming site of...
US20080274332 Optical Recording Medium and Method for Manufacturing Same, Substrate and Method for Using Same, and Stamper and Method for Manufacturing Same  
The present invention presents an optical recording medium capable of forming visible images of excellent visibility by using laser light, and a method for manufacturing the same. An optical...
7220535 Marking and authenticating articles  
Disclosed herein are methods and apparatus for providing markings upon objects, including the read side of an optical information media, where the markings do not substantially interfere with...

Matches 1 - 12 out of 12