Patents by Inventor Hong-rae Chang

Hong-rae Chang 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).

  • Weight balancer and pipe joining method
    Patent number: 8714434
    Abstract: The present invention relates to a weight balancer (100) and a pipe joining method that is capable of reducing a load of pipes when arranging and welding the pipes in ships, plants, piping work sites and the like.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: May 6, 2014
    Assignee: Samsung Heavy Ind. Co., Ltd.
    Inventors: Ki-Soo Cho, Young-jun Park, Sun-kyu Park, Seong-youb Chung, Hong-rae Chang, Young-youl Ha, Sung-joon Kim, Jong-il Park
  • Weight Balancer and Pipe Joining Method
    Publication number: 20090014500
    Abstract: The present invention relates to a weight balancer (100) and a pipe joining method that is capable of reducing a load of pipes when arranging and welding the pipes in ships, plants, piping work sites and the like.
    Type: Application
    Filed: February 23, 2007
    Publication date: January 15, 2009
    Applicant: Samsung Heavy Ind. Co., Ltd.
    Inventors: Ki-Soo Cho, Young-jun Park, Sun-kyu Park, Seong-youb Chung, Hong-rae Chang, Young-youl Ha, Sung-joon Kim, Jong-il Park