Patents by Inventor Hong Doo KOO

Hong Doo KOO 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).

  • DOOR CLOSER
    Publication number: 20210207417
    Abstract: The invention relates to a door closer having high usability and capable of saving installation cost. The door closer according to an example embodiment of the inventive concept includes a first closer part combined with a doorframe and a door to provide a rotational force in a direction in which the door is closed, and a second closer part to reduce a rotational speed of the door by a damping force of a viscous fluid contained thereinside when the door is closed by the first closer part.
    Type: Application
    Filed: November 29, 2017
    Publication date: July 8, 2021
    Applicant: SCWINNERS CO., LTD.
    Inventors: Hong Doo KOO, Chung Hyun RYU