Patents by Inventor Clinton Todd Stewart

Clinton Todd 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: 7783347
    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: September 1, 2006
    Date of Patent: August 24, 2010
    Assignee: Resmed Limited
    Inventors: Mark Alexander Abourizk, Paul Anthony Green, Clinton Todd Stewart