Patents by Inventor Gi Chul Choi

Gi Chul Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for embedding and extracting text into/from electronic documents
    Patent number: 6940995
    Abstract: The present invention relates to a method and apparatus for authenticating various types of digital certificates by using a text embedding method. The execution of the present invention is divided into two case, one case including images in the certificate and another case not including the images in the certificate, according to the characteristics of the certificate. In the former case, a text embedding method is applied to images included in the certificate to embed a series of information text (a specific number of the certificate, and issuing organization, name of a person in charge, etc.) designated by a person who issues the certificate into the images. In the latter case, there is generated an image imperceptible to the human eve but having the same color as the ground color certificate.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: September 6, 2005
    Assignee: Markany, Inc.
    Inventors: Jong Uk Choi, Gi Chul Choi
  • Method for embedding and extracting text into/from electronic documents
    Publication number: 20030099374
    Abstract: The present invention relates to a method and apparatus for authenticating various types of digital certificates by using a text embedding method. The execution of the present invention is divided into two cases, one case including images in the certificate and another case not including the images in the certificate, according to the characteristic of the certificate. In the former case, a text embedding method is applied to images included in the certificate to embed a series of information text (a specific number of the certificate, and issuing organization, name of a person in charge, etc.) designated by a person who issues the certificate into the images. In the latter case, there is generated an image imperceptible to the human eye but having the same color as the ground color of certificate.
    Type: Application
    Filed: October 17, 2002
    Publication date: May 29, 2003
    Inventors: Jong Uk Choi, Gi Chul Choi