Patents by Inventor Hisao Kitaguchi

Hisao Kitaguchi 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 type gas sensor having two terminals
    Patent number: 4688014
    Abstract: A gas senor having two terminals and comprising a heater having a positive temperature coefficient of resistance and a gas sensitive semiconductor covering the heater, connected to the heater at least at their opposite ends and having a negative temperature coefficient of resistance. The coefficients of the heater and the semiconductor are so selected as to offset each other in such a manner that a combined resistance of said heater and said semiconductor is maintained substantially constant at operation temperatures.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: August 18, 1987
    Assignee: New Cosmos Electric Co., Ltd.
    Inventor: Hisao Kitaguchi