Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 28, 2011
Patent Application Number
12104059
Date Filed
April 16, 2008
Patent Primary Examiner
Patent abstract
An image forming apparatus forms an image for a latent image portion of which density is relatively higher with a dark color image forming portion, and forms an image for a background portion of which density is relatively decreased or of which image disappears, with a light color image forming portion, with respect to portions of forgery-preventing pattern image in which the density contrasts for the portions mutually differ after copying.
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