Patents by Inventor Masachika Iida

Masachika Iida 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).

  • Protection circuit for a semiconductor device
    Patent number: 4937696
    Abstract: A protection circuit for a semiconductor device is disclosed. This circuit is connected in series with a power semiconductor device to be protected, and is comprised of a circuit breaker and current-limiting device. The current-limiting device limits the overcurrent, thereby providing a time allowance until the circuit breaker begins operate.
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: June 26, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hisashi Yoshino, Noburu Fukushima, Masakatsu Haga, Masachika Iida, Sadaaki Mori
  • Electrical contact
    Patent number: 4345130
    Abstract: Disclosed is an electrical contact of composite layer type which comprises an interrupting layer consisting of Cu-W alloy, Cu-WC alloy or Cu-W-WC alloy containing 20 to 60 wt % of Cu and being bonded to the top surface of a base plate, and a contacting layer consisting of Ag-WC alloy, Ag-W alloy or Ag-W-WC alloy containing 20 to 60 wt % of Ag and being bonded to the top surface of said interrupting layer.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: August 17, 1982
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Tsutomu Okutomi, Masachika Iida, Kazuyoshi Kuwabara, Hisashi Yoshino, Eiichi Takayanagi