Patents by Inventor Frederick E. Sistler

Frederick E. Sistler 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: 4975863
    Abstract: A particle examination system is provided, including a surface which provs a background such that particles on or suspended above the surface are distinguishable from the background; a video camera, for producing an image of the particles against the surface; and an image processor, connected to the video camera, for digitizing the image. A computer is utilized to analyze the digitized data from the image processor, allowing various types of comparisons to be made between the particles examined and a known standard. Additionally, the invention may include a vacuum device which, through holes on the surface, holds the particles in position for examination. A transparent/translucent or transparent surface may be provided, enabling illumination from beneath such plate, allowing analysis of particles for cracks and fissures.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: December 4, 1990
    Assignee: Louisiana State University and Agricultural and Mechanical College
    Inventors: Frederick E. Sistler, Malcolm E. Wright