Patents by Inventor Hun Sin

Hun Sin 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).

  • Chair with improved waist bearing power
    Patent number: 9237811
    Abstract: A chair with improved waist bearing power by self-weight is provided. A chair includes a supporting portion connected to a leg portion, a seat portion with one side connected to the supporting portion, a backrest post with other end installed to the supporting portion fixedly, a backrest frame with the one side connected to a top end of the backrest post, a backrest link having a top end portion inserted into a inserting groove formed in a lower-central rear surface of the backrest frame and a bottom end engaging the seat portion rotatingly, a link fixer connected to the backrest link rotatingly by a connecting axle and installed to the backrest post fixedly, and a backrest installed so as to be connected to the backrest frame and a top end portion of the backrest link and having flexibility.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: January 19, 2016
    Assignee: PATRA CO., LTD.
    Inventors: Hyo Seok Cho, Hun Sin