Patents by Inventor Robert E. Rainford

Robert E. Rainford 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 detecting defects in apertured plates
    Patent number: 4447152
    Abstract: A method and apparatus for detecting defects in apertures plates such as masks. The plate is illuminated by a collimated light beam and defects or irregularities are signalled by a bright spot of light. A modified microfilm reader or the like can be used to magnify and project an image of that portion of the plate associated with the bright spot of light.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: May 8, 1984
    Assignee: IBM Corp.
    Inventors: Robert E. Rainford, Mark M. Moser, Jon R. Ojala