Patents by Inventor Hyunhwan CHOI

Hyunhwan CHOI 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).

  • SUBSTRATE DETACHMENT APPARATUS AND METHOD FOR MANUFACTURING DISPLAY DEVICE USING THE SAME
    Publication number: 20160214367
    Abstract: Provided is a substrate detachment apparatus including a plurality of stepped substrates having a stair shape, each of which includes at least one or more stepped layers, the plurality of stepped substrates partially overlapping each other, a plurality of vacuum generating members coupled to holes formed in each of the stepped substrates, and a plurality of vacuum adsorption pads connected to the vacuum generating members, the plurality of vacuum adsorption pads being adsorbed to a substrate, wherein the stepped substrates vertically ascends in sequence inward from a stepped substrate connected to a plurality of vacuum adsorption pads, which are adsorbed to a outermost side of the substrate, of the vacuum adsorption pads.
    Type: Application
    Filed: September 9, 2015
    Publication date: July 28, 2016
    Inventors: Hyunhwan CHOI, Myunghwan PARK, Seung-Jin BAEK, ManHong NA, Kunhee JO
  • Unmanned aerial vehicle
    Patent number: D830897
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: October 16, 2018
    Inventor: Hyunhwan Choi