Patents by Inventor Seung Jin Ryu

Seung Jin Ryu 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 and apparatus for preventing illegitimate exit of printed document by applying security material
    Patent number: 9193173
    Abstract: An apparatus and method for preventing the illegitimate exit of a printed document by applying a security material. The apparatus includes an exit registration unit, a security printer unit, an exit management server unit, and an illegitimate exit detection unit. The exit registration unit generates information about the printed document of an electronic document, and sends the information to register the information about the printed document. The security printer unit prints the content and security identifier of the electronic document, and generates a secure printed document by applying a security material. The exit management server unit records and determines whether the secure printed document has been exited. The illegitimate exit detection unit detects the security material of the secure printed document, generates an exit warning, analyzes the security identifier, and determines whether the secure printed document is to be exited.
    Type: Grant
    Filed: May 17, 2015
    Date of Patent: November 24, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seung Jin Ryu, Min Sik Kim, Han Jun Yoon, Do Hoon Lee