Patents by Inventor Walter E. Marrable

Walter E. Marrable 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).

  • Semiconductor device lead inspection system
    Patent number: 5414458
    Abstract: An inspection system utilizes an image doubler design that includes a plurality of mirrors that effectively folds the object distance by reflecting the image along a folded path. Strobed illumination is used in conjunction with a shutterless camera. Increased image resolution results from an optional anamorphic lens with vertical magnification. The lens assembly includes concentric toroidal lens that are produced from a single piece of machineable optical material.
    Type: Grant
    Filed: April 6, 1993
    Date of Patent: May 9, 1995
    Assignee: Texas Instruments Incorporated
    Inventors: Charles K. Harris, Joseph F. Borchard, Robert H. Clunn, James R. Maunder, Walter E. Marrable