Sang Kohn Chang

Person

  • Taegu, KR

Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    ORTHODONTIC DEVICE

    • Publication number 20180140384
    • Publication date May 24, 2018
    • Sang Kohn CHANG
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    Manual hand ratch reamer for dentist

    • Publication number 20020034716
    • Publication date Mar 21, 2002
    • Sang Kohn Chang
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE