Patents by Inventor Ellis R. Graham

Ellis R. Graham 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).

  • Method and apparatus for measuring moisture tension in leaves of growing plants
    Patent number: 4380169
    Abstract: A method and apparatus to measure moisture tension in a leaf of a growing plant is described. The apparatus includes a pair of separable jaws for clamping a leaf between a standard light source and a photoelectric detector which are connected electrically to a regulated bias network and through an analog-to-digital converter panel meter. The measurement appearing on the readout is compared with a predetermined calibration source. The instrument as a whole is called a Moisture Tension Radiometer.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: April 19, 1983
    Assignee: The Curators of the University of Missouri
    Inventor: Ellis R. Graham