Patents by Inventor Gregory J. Pech

Gregory J. Pech 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).

  • Liquid crystal non-destructive inspection of non-ferrous metals
    Patent number: 4668916
    Abstract: A non-destructive inspection arrangement for ferrous and non-ferrous metallic workpieces. The inspection arrangement employs a liquid crystal indicator medium and electrical current flow through the workpiece to develop potential differences across work surface flaws that are to be detected. The concepts of direct application of the liquid crystal medium to the work area surface and containment of the liquid cyrstal medium within a viewing device are also included.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: May 26, 1987
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Gregory J. Pech