Patents by Inventor Edward J. Holub

Edward J. Holub 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).

  • Optical inspection method for determining machinability
    Patent number: 4320567
    Abstract: In a method for determining the machinability of a metal substrate for use in an electromechanical recording apparatus a surface of a foundation is coated with a layer of metal. The metal layer is machined such that the metalized surface of the foundation is substantially flat and smooth. After the machining step, the metal surface is inspected for depressions with a microscope using a differential interference contrast technique. The number of depressions observed is indicative of the machinability of the coated foundation.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: March 23, 1982
    Assignee: RCA Corporation
    Inventors: Pierre V. Valembois, Cheryl A. Deckert, Edward J. Holub