Patents by Inventor Yuji Hirosaki

Yuji Hirosaki 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).

  • Electroacoustic transducer, process of producing the same and electroacoustic transducing device using the same
    Patent number: 6870937
    Abstract: An electroacoustic transducer comprises: a lower electrode; an upper electrode including an oscillation portion and a support portion for supporting the oscillation portion at least at a part of a periphery of the oscillation portion; and an insulating layer for insulating the lower electrode from the upper electrode, wherein the upper electrode has an up and down in the oscillation portion and/or in the support portion to provide a cavity between the upper electrode and the lower electrode.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: March 22, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuji Hirosaki, Kiyoaki Tanaka, Shiro Kimura, Ikuo Yamamoto