Patents by Inventor Roger A. Dupre

Roger A. Dupre 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).

  • Sensor-holding device
    Patent number: 5069552
    Abstract: An apparatus for the analysis of a fluid flowing in a stream includes opposed hollow stems movable in a body member relative to each other. One stem contains a signalling source and the other contains a sensor for the signalling source.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: December 3, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Gregory D. Cramer, Roger A. Dupre, George H. Hitchcock