Patents by Inventor Frederick G. Danner

Frederick G. Danner 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).

  • Method for detecting and isolating faults in digital and analog circuits with multiple infrared scanning under conditions of different stimuli
    Patent number: 3991302
    Abstract: A method for detecting faults in digital and analog circuits including the steps of thermally stabilizing the circuit, applying electrical stimulus to the circuit for a predetermined time period, scanning the circuit to determine the infrared response, applying another desired electrical stimulus to the circuit for a predetermined time period, scanning the circuit to determine the infrared response, repeating the applying and scanning sequence as desired, and comparing the resulting infrared responses with normal infrared profiles to detect and isolate faults in the circuit.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: November 9, 1976
    Assignee: Grumman Aerospace Corporation
    Inventor: Frederick G. Danner