Patents by Inventor Joseph T. Wiskich

Joseph T. Wiskich 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).

  • Measurement of fluorescence
    Patent number: 4804850
    Abstract: A fluorometer probe head and a method of operating a probe to overcome problems of reflectance.A preferred embodiment for determination of chlorophyll in plant leaves uses a red LED and a green LED consecutively directed to a particular target spot and a photodiode records fluoresced and reflected signals to provide an accurate result.
    Type: Grant
    Filed: March 13, 1987
    Date of Patent: February 14, 1989
    Assignee: Luminis Pty. Limited
    Inventors: Richard J. Norrish, Joseph T. Wiskich