Patents by Inventor Won-Sik Chu

Won-Sik Chu 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).

  • Publication number: 20080308779
    Abstract: The present invention relates to a resin guardrail including a post, a plurality of guard plates coupled to the post, and connection members for connecting the guard plates to one another. Each of the guard plates of the guardrail is manufactured through extrusion. The guard plate comprises a hollow base body that takes the shape of a wave in cross section to include a rear ridge protruding rearward and having a flat portion and a front ridge protruding forward. The flat portion of the rear ridge and the front ridge are formed with first and second fastening holes, respectively, and the base body has solid portions for reinforcing regions with the first and second fastening holes formed therein.
    Type: Application
    Filed: November 23, 2004
    Publication date: December 18, 2008
    Applicants: WOORIELTECH CO., LTD.
    Inventors: Cheol Yu, Boo-Young Han, Won-Sik Chu, Soon-Yi Yoo