Patents by Inventor Thomas N. Johnson

Thomas N. Johnson 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 of laser drilling a substrate
    Patent number: 4948941
    Abstract: A method of laser drilling a substrate includes the steps of placing a sacrificial member over the substrate, and then laser drilling through the sacrificial member. This method produces a substantially uniform hole in the substrate.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: August 14, 1990
    Assignee: Motorola, Inc.
    Inventors: Leonard F. Altman, Thomas N. Johnson