Patents by Inventor Duck-Hyun Hwang

Duck-Hyun Hwang 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).

  • Lithium secondary battery
    Patent number: 11936041
    Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a lithium metal oxide including elements the same as those of the first cathode active material particle, and the second cathode active material particle has a uniform composition from a central portion to a surface.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: March 19, 2024
    Assignee: SK ON CO., LTD.
    Inventors: Kook Hyun Han, Kyung Bin Yoo, Duck Chul Hwang
  • Motor car
    Patent number: D901332
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: November 10, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Chan-Hee Lee, Duck-Hyun Hwang, Goo Lee
  • Front bumper cover for vehicles
    Patent number: D901344
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: November 10, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Su-Ji Kim, Duck-Hyun Hwang
  • Head lamp for vehicles
    Patent number: D901733
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: November 10, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Gyu-Bong Kim, Chan-Hee Lee, Duck-Hyun Hwang
  • Rear combination lamp for vehicles
    Patent number: D901734
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: November 10, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Gyu-Bong Kim, Duck-Hyun Hwang, Chan-Hee Lee
  • Rear combination lamp for vehicles
    Patent number: D901735
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: November 10, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Gyu-Bong Kim, Chan-Hee Lee, Duck-Hyun Hwang
  • Head lamp for vehicles
    Patent number: D902458
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: November 17, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Gyu-Bong Kim, Chan-Hee Lee, Duck-Hyun Hwang
  • Automobile
    Patent number: D1015947
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: February 27, 2024
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventor: Duck Hyun Hwang