Patents by Inventor Sang Tai YU

Sang Tai YU 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).

  • Resonator, and filter and duplexer having the same
    Patent number: 11955949
    Abstract: A resonator includes: interdigital transducer (IDT) including first electrode including first base on piezoelectric substrate and extended in reference direction, and first protrusions connected to the first base and extended in direction intersecting with the reference direction, and second electrode including second base on the piezoelectric substrate and extended in the reference direction, and second protrusions connected to the second base and extended in direction intersecting with the reference direction, each of the second protrusions extended to have one of the first protrusions inserted between the second protrusion and another second protrusion adjacent to the second protrusion, wherein a width of each of first specific protrusions included between one end of the IDT and first position at first distance from the one end, among the first protrusions and the second protrusions, decreases from first specific protrusion closest to the first position toward first specific protrusion closest to the one e
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: April 9, 2024
    Assignee: WISOL CO., LTD.
    Inventors: Toshihiko Kawamoto, Ryota Sato, Sang Tai Yu, Je Cheol Lee
  • RESONATOR, AND FILTER AND DUPLEXER HAVING THE SAME
    Publication number: 20210367580
    Abstract: A resonator includes: interdigital transducer (IDT) including first electrode including first base on piezoelectric substrate and extended in reference direction, and first protrusions connected to the first base and extended in direction intersecting with the reference direction, and second electrode including second base on the piezoelectric substrate and extended in the reference direction, and second protrusions connected to the second base and extended in direction intersecting with the reference direction, each of the second protrusions extended to have one of the first protrusions inserted between the second protrusion and another second protrusion adjacent to the second protrusion, wherein a width of each of first specific protrusions included between one end of the IDT and first position at first distance from the one end, among the first protrusions and the second protrusions, decreases from first specific protrusion closest to the first position toward first specific protrusion closest to the one e
    Type: Application
    Filed: May 14, 2021
    Publication date: November 25, 2021
    Inventors: Toshihiko Kawamoto, Ryota Sato, Sang Tai YU, Je Cheol LEE