Patents by Inventor David R. Vaughn

David R. Vaughn 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).

  • Substrate location and detection apparatus
    Patent number: 5418382
    Abstract: A device for detecting and locating substrates in a cassette including a homogeneous columnar radiation source adjacent to and radiating the edges of the substrates, rod-shaped directional lenses transmitting and replicating the substrate edges in their field of view and directing the transmitted reflected radiation and image of the field of view onto sensing pixels activated to produce indications of the presence and location of the substrates in the cassette.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: May 23, 1995
    Assignee: FSI International, Inc.
    Inventors: Robert S. Blackwood, David R. Vaughn, Billy R. Masten, Timothy B. Vaughn