Patents by Inventor Hiroshi Nakajoh

Hiroshi Nakajoh 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).

  • Electric resistance element exhibiting voltage nonlinearity characteristic and method of manufacturing the same
    Patent number: 5807510
    Abstract: A composition for electric material containing as a primary component zinc oxide. The composition further contains at least one of rare-earth elements in a range of 0.01 mol % to 3.0 mol % in terms of oxide thereof given by R.sub.2 O.sub.3 where R represents generally the rare-earth elements, and aluminum in a range of 0.0005 mol % to 0.005 mol % in terms of aluminum oxide given by Al.sub.2 O.sub.3. The composition is suited for manufacturing a resistance element whose varistor voltage can be increased over a whole current range without being accompanied with any appreciable degradation in flatness ratio of a voltage-versus-current characteristic.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: September 15, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Naomi Furuse, Masahiro Kobayashi, Toshihiro Suzuki, Junichi Shimizu, Yoshio Takada, Hiroshi Nakajoh, Kei-Ichiro Kobayashi, Tomoaki Kato