Patents by Inventor James W. Bethea, III

James W. Bethea, III 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 and apparatus for measuring stimulated acoustic reflex latency time
    Patent number: 4201225
    Abstract: In a hearing test apparatus, a continuous tone of constant frequency is applied to one ear of a patient. A second tone is initiated in an ear of the patient and the resulting response of the intra-aural muscles is detected by measuring the change in ear canal compliance. A clock circuit measures the time period from the input of the second frequency tone to the point of response of the intra-aural muscles. This reflex latency time provides an objective measurement useful in evaluating a patient's hearing ability.
    Type: Grant
    Filed: September 2, 1977
    Date of Patent: May 6, 1980
    Inventors: James W. Bethea, III, O. Clayton Mitchell, George B. Richards