Patents by Inventor Yeon Seok Song

Yeon Seok 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).

  • Cathode for lithium secondary battery and lithium secondary battery including the same
    Patent number: 11978901
    Abstract: A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes a cathode active material and a conductive material ID/IG is in a range from 0.5 to 1.25 in a Raman spectrum of the cathode active material layer. The cathode active material includes lithium metal oxide particles containing nickel and manganese and having a content of cobalt of less than 2 mol % among all elements except for lithium and oxygen.
    Type: Grant
    Filed: June 20, 2023
    Date of Patent: May 7, 2024
    Assignee: SK ON CO., LTD.
    Inventors: Yong Seok Lee, Jae Ram Kim, Ji Won Na, Sang Won Bae, Yeon Hwa Song, Ki Joo Eom, Myung Ro Lee, Jae Yeong Lee, Hyun Joong Jang
  • Power interface circuit of contact IC card reader
    Patent number: 8610468
    Abstract: A power interface circuit of a contact integrated circuit (IC) card reader is provided.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: December 17, 2013
    Assignee: Samsung SDS Co., Ltd.
    Inventors: Hyun Soo Park, Byeong Cheon Jeong, Kyung Hoon Kim, Yeon Seok Song, Min Gyu Maing, Hong Chul Lee
  • POWER INTERFACE CIRCUIT OF CONTACT IC CARD READER
    Publication number: 20110254620
    Abstract: A power interface circuit of a contact integrated circuit (IC) card reader is provided.
    Type: Application
    Filed: December 11, 2009
    Publication date: October 20, 2011
    Applicant: SAMSUNG SDS CO., LTD.
    Inventors: Hyun Soo Park, Byeong Cheon Jeong, Kyung Hoon Kim, Yeon Seok Song, Min Gyu Maing, Hong Chul Lee