Patents by Inventor Du-Hyeon Song

Du-Hyeon Song 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).

  • PLURALITY OF HOST MATERIALS, ORGANIC ELECTROLUMINESCENT COMPOUND, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20240090324
    Abstract: The present disclosure relates to a plurality of host materials, an organic electroluminescent compound, and an organic electroluminescent device comprising the same. An organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifespan properties compared to a conventional organic electroluminescent device can be provided by including the specific combination of compounds according to the present disclosure as a plurality of host materials or by including the compound according to the present disclosure.
    Type: Application
    Filed: July 18, 2023
    Publication date: March 14, 2024
    Inventors: Hyo-Jung LEE, Yea-Mi SONG, Hyun-Ju KANG, Mi-Ja LEE, Doo-Hyeon MOON, Kyoung-Jin PARK, Du-Yong PARK, DaiKyu KIM
  • Apparatus for interchanging welding tips of spot welding gun
    Patent number: 9908204
    Abstract: The present invention relates to an apparatus for interchanging welding tips of a spot welding gun. According to the present invention, an apparatus for interchanging welding tips of a spot welding gun comprises: a post frame provided with a connection plate on a top surface; a tip-removal means coupled at a predetermined position on one side surface of the post frame; and a tip-setting means coupled to a top surface of the connection plate.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: March 6, 2018
    Assignee: KOREA T&M CO., LTD.
    Inventors: Seung-Hae Lee, Du-Hyeon Song, Joo-Hyun Lee
  • Apparatus for changing welding tip
    Patent number: 9744626
    Abstract: An apparatus for interchanging welding tips of a spot welding gun. The apparatus replaces a welding tip installed in a robot arm and includes welding tip removal componentry combined with the robot arm, welding tip mounting structure combined with one side of the welding tip removal componentry, and a welding tip supply spaced apart from the welding gun at a specific distance and configured to supply a welding tip to the welding tip mounting componentry.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: August 29, 2017
    Assignee: KOREA T&M CO. LTD.
    Inventors: Seung-Hae Lee, Du-Hyeon Song, Joo-Hyun Lee
  • APPARATUS FOR CHANGING WELDING TIP
    Publication number: 20150038306
    Abstract: An apparatus for interchanging welding tips of a spot welding gun. The apparatus replaces a welding tip installed in a robot arm and includes welding tip removal componentry combined with the robot arm, welding tip mounting means combined with one side of the welding tip removal componentry, and a welding tip supply spaced apart from the welding gun at a specific distance and configured to supply a welding tip to the welding tip mounting componentry.
    Type: Application
    Filed: February 12, 2014
    Publication date: February 5, 2015
    Inventors: Seung-Hae Lee, Du-Hyeon Song, Joo-Hyun Lee
  • APPARATUS FOR INTERCHANGING WELDING TIPS OF SPOT WELDING GUN
    Publication number: 20150020382
    Abstract: The present invention relates to an apparatus for interchanging welding tips of a spot welding gun. According to the present invention, an apparatus for interchanging welding tips of a spot welding gun comprises: a post frame provided with a connection plate on a top surface; a tip-removal means coupled at a predetermined position on one side surface of the post frame; and a tip-setting means coupled to a top surface of the connection plate.
    Type: Application
    Filed: November 27, 2012
    Publication date: January 22, 2015
    Applicant: KOREA T&M CO., LTD.
    Inventors: Seung-Hae Lee, Du-Hyeon Song, Joo-Hyun Lee