Sang Yub Lee

4 Patents

• US125343382026

  Magnetic Field Sensing-based Noncontact Button Apparatus, Elevator Control Panel, and Operating Method Thereof

  Korea Electronics Technology Institute

  0 cites
• US120633072024

  Contract Apparatus and Method of Blockchain Using Location Information

  CY2CODE Co. Ltd

  0 cites
• US120582732024

  Contract Apparatus and Method of Blockchain Using Digital Contents Orginal Key

  CY2CODE Co. Ltd

  0 cites
• US115459752023

  Mechanical Button Apparatus

  Korea Electronics Technology Institute

  0 cites