Patents by Inventor Mark C. Thomas

Mark C. Thomas 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).

  • Helicopter blade crack detection system
    Patent number: 5205710
    Abstract: The invention is a helicopter blade crack detection system for blades that are hollow and pressurized or evacuated to a low pressure A rotating assembly having a rotating indicator assembly photo-optically communicates to an airframe detection assembly providing high reliability, ease of maintenance, and EMI secured.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: April 27, 1993
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Geoffrey P. Engels, Mark C. Thomas