Patents by Inventor Yun Kwon CHOI

Yun Kwon CHOI 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).

  • Publication number: 20140056449
    Abstract: A stacked piezoelectric speaker device having a structure where a piezoelectric ceramic plate and an internal electrode plate are stacked, in which an inactive dummy electrode is disposed around an active internal electrode on the same layer to ensure uniform plastic shrinkage. The stacked piezoelectric speaker device has a structure in which an inactive dummy electrode that does not contribute to polarization is disposed around an active internal electrode that contributes to the polarization, the active internal electrode and the inactive dummy electrode being stacked on the same layer.
    Type: Application
    Filed: September 18, 2012
    Publication date: February 27, 2014
    Applicant: WISOL CO., LTD.
    Inventors: Yukihiro NORO, Sang Sub ROH, Yun Kwon CHOI