Patents by Inventor Clinton T. Stewart

Clinton T. Stewart 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 testing sleepiness
    Patent number: 7226164
    Abstract: A method and apparatus are provided for authenticating a measure of sleepiness in a person in which a measure of the person's sleepiness and an authentication step are performed substantially simultaneously on substantially the same physical attribute of the person. In one form, an eye of a person is scanned under infrared light and a unique identifying code is calculated from the iris as an authentication step. In one form, a measure of the person's sleepiness is determined from changes in the pupil size with time.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: June 5, 2007
    Assignee: ResMed Limited
    Inventors: Mark A. Abourizk, Paul A. Green, Clinton T. Stewart
  • Method and apparatus for testing sleepiness
    Publication number: 20030218719
    Abstract: A method and apparatus are provided for authenticating a measure of sleepiness in a person in which a measure of the person's sleepiness and an authentication step are performed substantially simultaneously on substantially the same physical attribute of the person. In one form, an eye of a person is scanned under infrared light and a unique identifying code is calculated from the iris as an authentication step. In one form, a measure of the person's sleepiness is determined from changes in the pupil size with time.
    Type: Application
    Filed: May 21, 2003
    Publication date: November 27, 2003
    Inventors: Mark A. Abourizk, Paul A. Green, Clinton T. Stewart