Patents by Inventor Ryu Changkeun

Ryu Changkeun 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).

  • Adjust button of gas cylinder of chair used as palm message
    Patent number: 6416131
    Abstract: This invention relates to the adjustment button to control the control valve of gas(oil) cylinder for adjustment of height of swivel chair. It can be or of slant of swivel chair and simultaneously used as the palm massage to stimulate a respective portion of human body and accordingly stimulate the human body to guarantee healthy living. The push button means 300 is connected to the control valve of gas cylinder 200 via wire cable 400 and not only provides adjustment function to adjust the height of seat 110 of swivel chair or slant of back 120 of chair, but also can be used palm massaging means 500 to massage the palm.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: July 9, 2002
    Inventor: Ryu Changkeun