Patents by Inventor Tomoharu Kondo

Tomoharu Kondo 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).

  • Resistance adjusting type heater
    Patent number: 5202547
    Abstract: A resistance adjusting type heater has a honeycomb structure having a large number of passages, at least two electrodes to enable electrical heating of the honeycomb structure provided on the honeycomb structure, and a resistance adjusting means, a slit, provided between the electrodes. The thicknesses of passage walls at the portions of the honeycomb structure at which electricity flows at a very high density are increased with a conductive material to prevent the abnormal heat generation at the portions of the honeycomb structure.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: April 13, 1993
    Assignee: NGK Insulators, Ltd.
    Inventors: Fumio Abe, Hiroshige Mizuno, Takashi Harada, Tomoharu Kondo