Patents by Inventor Kenji Nagareda

Kenji Nagareda 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).

  • Semiconductor ceramic for thermistors and chip-type thermistor including the same
    Patent number: 6538318
    Abstract: A semiconductor ceramic for thermistors contains zinc oxide and titanium oxide as main components and a predetermined content of manganese. Also, a chip-type thermistor including the semiconductor ceramic is provided. By adding manganese, the resistance-temperature characteristic is controllable in the range of positive temperature coefficient to negative temperature coefficient. Also, by adding nickel, the resistivity is controllable. As a result, a thermistor material which provides a series of semiconductor ceramics having various resistivities and various B constants in a low range, for example 0 to 1,000 K, is available.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: March 25, 2003
    Assignee: Murata Manufacturing, Co., Ltd.
    Inventors: Kenji Nagareda, Kenjirou Mihara, Hideaki Niimi, Yuichi Takaoka
  • Semiconductor ceramic for thermistors and chip-type thermistor including the same
    Publication number: 20020121696
    Abstract: A semiconductor ceramic for thermistors contains zinc oxide and titanium oxide as main components and a predetermined content of manganese. Also, a chip-type thermistor including the semiconductor ceramic is provided. By adding manganese, the resistance-temperature characteristic is controllable in the range of positive temperature coefficient to negative temperature coefficient. Also, by adding nickel, the resistivity is controllable. As a result, a thermistor material which provides a series of semiconductor ceramics having various resistivities and various B constants in a low range, for example 0 to 1,000 K, is available.
    Type: Application
    Filed: December 14, 2001
    Publication date: September 5, 2002
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Kenji Nagareda, Kenjirou Mihara, Hideaki Niimi, Yuichi Takaoka