Patents by Inventor John G. Durden

John G. Durden 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).

  • Neurological monitoring device test circuitry
    Patent number: 4424816
    Abstract: Circuitry for use with a brain wave monitoring device is provided for selectively monitoring the impedance of the current paths in the patient's scalp concurrently with brain wave monitoring, and circuitry for self-testing the system for proper functioning.
    Type: Grant
    Filed: April 29, 1981
    Date of Patent: January 10, 1984
    Assignee: Neurologics, Inc.
    Inventors: Alfred S. Callahan, James S. Rhodes, Timothy L. Johnson, John G. Durden