Patents by Inventor Michael C. Leigh

Michael C. Leigh 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).

  • Cutting sound enhancement system for mining machines
    Patent number: 5121365
    Abstract: A cutting sound enhancement system (10) for transmitting an audible signal from the cutting head (101) of a piece of mine machinery (100) to an operator at a remote station (200), wherein, the operator using a headphone unit (14) can monitor the difference in sounds being made solely by the cutting head (101) to determine the location of the roof, floor, and walls of a coal seam (50).
    Type: Grant
    Filed: January 24, 1991
    Date of Patent: June 9, 1992
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Michael C. Leigh, August J. Kwitowski