Patents by Inventor Jai Chul Sim

Jai Chul Sim 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).

  • Reinforced steel beam and hybrid joist
    Publication number: 20030115827
    Abstract: The I-beam or joist is reinforced with corrugation on its web to form triangular pattern of trust structure. It can also reduce weight by punching holes in between corrugations. This not only reduce weight, but also provide space for utilities lines, which offer more overhead room, better architectural design, and lower construction cost.
    Type: Application
    Filed: December 26, 2001
    Publication date: June 26, 2003
    Inventors: Jai Chul Sim, Jai Ho Sim