Patents by Inventor Jack G. Firth

Jack G. Firth 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).

  • Gas sensors
    Patent number: 4198850
    Abstract: In a gas-sensitive resistor of the metal oxide type, the sensitive body is a single crystal of zinc oxide. Such a sensor has particular application in the testing of oxygen-containing atmospheres for the presence of carbon monoxide.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: April 22, 1980
    Assignee: National Research Development Corporation
    Inventors: Jack G. Firth, Alan Jones, Thomas A. Jones, Brenda Mann