Patents by Inventor Thomas Frank Sartor

Thomas Frank Sartor 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).

  • Patent number: 5748766
    Abstract: A fingerprint image capture system reduces tip smear by ceasing to update a data array characteristic of the rolled fingerprint image behind an advancing freeze column at least about half way from the trailing edge to the leading edge of a finger contact strip.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: May 5, 1998
    Assignee: Identix Incorporated
    Inventors: Daniel Frederick Maase, Thomas Frank Sartor
  • Patent number: 5650842
    Abstract: A device for providing a plain image signal indicative of a plain image of surface characteristics of more than one finger on a hand includes an plain platen prism having a flat, rectangular shaped finger receiving surface having a platen aspect ratio greater than 1.33:1. An illumination source internally illuminates the finger receiving surface such that light internally illuminating a bare portion of the finger receiving surface is internally reflected from the finger receiving surface and light internally illuminating a contacted portion of the finger receiving surface in contact with the fingers is not internally reflected from the finger receiving surface. The internally reflected light forms a reflection image of the surface characteristics of the fingers. Optical elements direct the reflection image to a camera. The camera, which has a rectangular receiving surface with an aspect ratio of approximately 1.33:1, receives the reflection image and provides the plain image signal in response.
    Type: Grant
    Filed: October 27, 1995
    Date of Patent: July 22, 1997
    Assignee: Identix Incorporated
    Inventors: Daniel Frederick Maase, Thomas Frank Sartor