Patents by Inventor Barry L. Evans

Barry L. Evans 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).

  • Hybrid electronic and electromechanical device for the production of tremulant sound
    Patent number: 5848166
    Abstract: An audio tremolo producing system uses a rotating horn as a tremolo producing device for mid and high frequency audio signals, and an electronic tremolo producing device capable of both phase and amplitude modulation for low frequency signals.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: December 8, 1998
    Assignee: Ztech L.C.
    Inventors: John H. Fisher, Barry L. Evans, Kenneth W. Horch
  • Apparatus for automated determination of low frequency tactile thresholds
    Patent number: 5673703
    Abstract: An apparatus for automated testing of vibrotactile responses of a patient is disclosed. The embodiment of the invention comprises a component to apply indentations and vibrations to the patient's skin to test the patient's response to vibrotactile stimuli. In the preferred embodiment of the invention, a general purpose computer functions to control the operation of the system and to record and store the patient's responses. Indentations and vibrations are produced by off-axis rotational movement of a stimulation probe. A frequency modulated signal generated by the computer is used to control the motor which drives the stimulation probe. The embodiment of the present invention is able to reliably repeat each test so that the tests are reproducible and are carried out in an objective manner.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: October 7, 1997
    Assignee: Ztech, L.C.
    Inventors: John H. Fisher, Barry L. Evans, Kenneth W. Horch
  • Cutaneous testing device for determining nervous system function
    Patent number: 5381805
    Abstract: An automatic apparatus for testing cutaneous responses of a patient is disclosed. The embodiments of the invention variously include components for: applying a nonambient temperature to the patient's skin to test the patient's response to thermal stimuli; pricking the patient's skin to test the patient's response to pain; indenting the patient's skin to test the patient's response to touch; vibrating the patient's skin to test the patient's response to vibration; and for making two spaced apart contacts with the patient's skin to test the patient's two point discrimination response. A general purpose computer and dedicated control circuits function to control the operation of the system and record the responses of the patient. The embodiments of the present invention are able to repeatedly reproduce each test so that the tests carried out are reproducible and accomplished in a minimum of time.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: January 17, 1995
    Assignee: Topical Testing, Inc.
    Inventors: Robert P. Tuckett, Kenneth W. Horch, John H. Fisher, Barry L. Evans
  • Tactile testing device and methods
    Patent number: 5363859
    Abstract: An automatic apparatus for testing tactile responses of a patient is disclosed. The embodiments of the invention variously include components for: applying a nonambient temperature to the patient's skin to test the patient's response to thermal stimuli; pricking the patient's skin to test the patient's response to pain; indenting the patient's skin to test the patient's response to touch; vibrating the patient's skin to test the patient's response to vibration; and for making two spaced apart contacts with the patient's skin to test the patient's two point discrimination response. A general purpose computer and dedicated control circuits function to control the operation of the system and record the responses of the patient. The embodiments of the present invention are able to repeatedly reproduce each test so that the tests carried out are reproducible and accomplished in a minimum of time.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: November 15, 1994
    Assignee: Topical Testing, Inc.
    Inventors: Robert P. Tuckett, Kenneth W. Horch, John H. Fisher, Barry L. Evans
  • Apparatus for automated tactile testing
    Patent number: 5022407
    Abstract: An automatic apparatus for testing tactile responses of a patient is disclosed. The embodiments of the invention variously include components for: applying a nonambient temperature to the patient's skin to test the patient's response to thermal stimuli; pricking the patient's skin to test the patient's response to pain; indenting the patient's skin to test the patient's response to touch; vibrating the patient's skin to test the patient's response to vibration; and for making two spaced apart contacts with the patient's skin to test the patient's two point discrimination response. A general purpose computer and dedicated control circuits function to control the operation of the system and record the responses of the patient. The embodiments of the present invention are able to repeatedly reproduce each test so that the tests carried out are reproducible and accomplished in a minimum of time.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: June 11, 1991
    Assignee: Topical Testing, Inc.
    Inventors: Kenneth W. Horch, John H. Fisher, Barry L. Evans