Patents by Inventor Charles E. Crouch

Charles E. Crouch 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).

  • Coal-rock interface detector
    Patent number: 4165460
    Abstract: A coal-rock interface detector employing a radioactive source and radiation sensor wherein the source and sensor are separately and independently suspended and positioned against a mine surface of hydraulic pistons which are biased from an air cushioned source of pressurized hydraulic fluid.
    Type: Grant
    Filed: November 4, 1977
    Date of Patent: August 21, 1979
    Inventors: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Stephen D. Rose, Charles E. Crouch, Elborn W. Jones