Patents by Inventor Jeong Keun Oh

Jeong Keun Oh 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).

  • DOUGHTNUT-SHAPED HOLLOW CORE BODY, BIDIRECTIONAL HOLLOW CORE SLAB USING THE SAME, AND CONSTRUCTION METHOD THEREOF
    Publication number: 20130036693
    Abstract: The present invention relates to a lightweight bidirectional hollow core slab, and a doughnut-shaped hollow core body which may be advantageously used in the construction of a bidirectional hollow core slab. The doughnut-shaped hollow core body according to the present invention includes an outer case formed in a generally doughnut shape, wherein a hollow portion with a circular section is formed in the center thereof and corners are rounded with curved surfaces. The bidirectional hollow core slab according to the present invention is made by stably locating the doughnut-shaped hollow core bodies in concrete in such a manner that the doughnut-shaped hollow core body is restrained and mounted in steel bar cages or on the upper and lower steel bars.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 14, 2013
    Inventors: Seung Chang Lee, Jeong Keun Oh, Chang Sik Choi, Hyun Ki Choi