Patents by Inventor Hideyuki Harada

Hideyuki Harada 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).

  • Multi-terminal surge protection device
    Patent number: 5905282
    Abstract: A multi-terminal surge protection device able to absorb surges of either polarity between lines and between a line and ground, in which the difference in operating time between the device elements connected to lines is reduced. A plurality of unipolar surge protection device elements are used which only operate to absorb surges of a specific polarity, and do not exhibit a reverse withstand characteristic upon application of a reverse-polarity voltage. One element is connected to a first line and another element to a second line, while a different element is connected to ground. A semiconductor substrate and second electrode are used that are common to all elements. To prevent lateral interference between elements, at least the element connected to ground is isolated from the line elements.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: May 18, 1999
    Assignees: Sankosha Corporation, Optotechno Co., Ltd.
    Inventors: Masaaki Sato, Mitsuru Inoue, Yasuharu Yamada, Akihiro Kasai, Hideyuki Harada, Hirofumi Yoshihara