Patents by Inventor Won Kyun CHOE

Won Kyun CHOE 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).

  • ALNICO-BASED HARD MAGNETIC PARTICLE AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20220172867
    Abstract: Disclosed is an AlNiCo-based hard magnetic particle containing Al, Ni, Co, Cu, Ti, and the balance of Fe. The AlNiCo-based hard magnetic particle contains Co in an amount of 10 to 17 wt %, has a coercive force of 250-450 Oe, and has a residual magnetization/coercive force rate of 0.06 or more. The AlNiCo-based hard magnetic particle according to the present invention can advantageously guarantee magnetic properties suitable for being detected by a magnetic reluctance device due to a low content of Co.
    Type: Application
    Filed: August 5, 2019
    Publication date: June 2, 2022
    Applicant: KOREA MINTING, SECURITY PRINTING & IDCARD OPERATING CORP.
    Inventors: Soo Dong KIM, Won Kyun CHOE, Sung Hyun JOO, Hong Keon KIM, Hyun Soo KIM
  • MAGNETIC PARTICLE FOR SECURITY INK AND SECURITY INK COMPRISING THE SAME
    Publication number: 20220153055
    Abstract: Disclosed are a magnetic particle and a security ink containing the same. The magnetic particle includes a magnetic core, and a metal coating layer formed outside the magnetic core. The magnetic particle has a surface roughness (Ra) of 0.15 ?m or less. The magnetic particle according to the present invention is suitable for application to a security ink because an abnormal increase in particle size does not occur after the metal coating layer is formed.
    Type: Application
    Filed: August 5, 2019
    Publication date: May 19, 2022
    Applicant: KOREA MINTING, SECURITY PRINTING & IDCARD OPERATING CORP.
    Inventors: Soo Dong KIM, Won Kyun CHOE, Sung Hyun JOO, Hong Keon KIM, Hyun Soo KIM